Multiplayer-Piano script.js (it my first paste).

$(function() {

	var test_mode = (window.location.hash && window.location.hash.match(/^(?:#.+)*#test(?:#.+)*$/i));

	var gSeeOwnCursor = (window.location.hash && window.location.hash.match(/^(?:#.+)*#seeowncursor(?:#.+)*$/i));

	var gMidiOutTest = (window.location.hash && window.location.hash.match(/^(?:#.+)*#midiout(?:#.+)*$/i)); // todo this is no longer needed

	if (!Array.prototype.indexOf) {
		Array.prototype.indexOf = function(elt /*, from*/) {
			var len = this.length >>> 0;
			var from = Number(arguments[1]) || 0;
			from = (from < 0) ? Math.ceil(from) : Math.floor(from);
			if (from < 0) from += len;
			for (; from < len; from++) {
				if (from in this && this[from] === elt) return from;
			}
			return -1;
		};
	}

	window.requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame
		|| window.webkitRequestAnimationFrame || window.msRequestAnimationFrame
		|| function (cb) { setTimeout(cb, 1000 / 30); };







	var gSoundPath = "/mp3/";
	var gSoundExt = ".wav.mp3";

	// Yoshify.
	if ((window.location.hash && window.location.hash.match(/^(?:#.+)*#Piano_Great_and_Soft(?:#.+)*$/i))) {
		gSoundPath = "https://dl.dropboxusercontent.com/u/216104606/GreatAndSoftPiano/";
		gSoundExt = ".mp3";
	}

	if ((window.location.hash && window.location.hash.match(/^(?:#.+)*#Piano_Loud_and_Proud(?:#.+)*$/i))) {
		gSoundPath = "https://dl.dropboxusercontent.com/u/216104606/LoudAndProudPiano/";
		gSoundExt = ".mp3";
	}

	// electrashave
	if((window.location.hash && window.location.hash.match(/^(?:#.+)*#NewPiano(?:#.+)*$/i))) {
		gSoundPath = "https://dl.dropboxusercontent.com/u/258840068/CustomSounds/NewPiano/";
		gSoundExt = ".mp3";
	}

	// Ethan Walsh
	if((window.location.hash && window.location.hash.match(/^(?:#.+)*#HDPiano(?:#.+)*$/i))) {
		gSoundPath = "https://dl.dropboxusercontent.com/u/258840068/CustomSounds/HDPiano/";
		gSoundExt = ".wav";
	}
	if((window.location.hash && window.location.hash.match(/^(?:#.+)*#Harpischord(?:#.+)*$/i))) {
		gSoundPath = "https://dl.dropboxusercontent.com/u/24213061/Harpischord/";
		gSoundExt = ".wav";
	}
	if((window.location.hash && window.location.hash.match(/^(?:#.+)*#ClearPiano(?:#.+)*$/i))) {
		gSoundPath = "https://dl.dropboxusercontent.com/u/24213061/ClearPiano/";
		gSoundExt = ".wav";
	}

	// Alexander Holmfjeld
	if((window.location.hash && window.location.hash.match(/^(?:#.+)*#Klaver(?:#.+)*$/i))) {
		gSoundPath = "https://dl.dropboxusercontent.com/u/70730519/Klaver/";
		gSoundExt = ".wav";
	}






























	var DEFAULT_VELOCITY = 0.5;












































	var TIMING_TARGET = 1000;



















// Utility

////////////////////////////////////////////////////////////////



var Rect = function(x, y, w, h) {
	this.x = x;
	this.y = y;
	this.w = w;
	this.h = h;
	this.x2 = x + w;
	this.y2 = y + h;
};
Rect.prototype.contains = function(x, y) {
	return (x >= this.x && x <= this.x2 && y >= this.y && y <= this.y2);
};
















// performing translation

////////////////////////////////////////////////////////////////

	var Translation = (function() {
		var strings = {
			"people are playing": {
				"pt": "pessoas estГЈo jogando",
				"es": "personas estГЎn jugando",
				"ru": "человек играет",
				"fr": "personnes jouent",
				"ja": "дєєгЃЊйЃЉг‚“гЃ§гЃ„г‚‹",
				"de": "Leute spielen",
				"zh": "人被打",
				"nl": "mensen spelen",
				"pl": "osГіb grajД…",
				"hu": "ember jГЎtszik"
			},
			"New Room...": {
				"pt": "Nova Sala ...",
				"es": "Nueva sala de...",
				"ru": "Новый номер...",
				"ja": "新しい部屋",
				"zh": "ж–°ж€їй—ґ",
				"nl": "nieuwe Kamer",
				"hu": "Гєj szoba"
			},
			"room name": {
				"pt": "nome da sala",
				"es": "sala de nombre",
				"ru": "название комнаты",
				"fr": "nom de la chambre",
				"ja": "гѓ«гѓјгѓ еђЌ",
				"de": "Raumnamen",
				"zh": "ж€їй—ґеђЌз§°",
				"nl": "kamernaam",
				"pl": "nazwa pokГіj",
				"hu": "szoba neve"
			},
			"Visible (open to everyone)": {
				"pt": "VisГ­vel (aberto a todos)",
				"es": "Visible (abierto a todo el mundo)",
				"ru": "Visible (открытый для всех)",
				"fr": "Visible (ouvert Г  tous)",
				"ja": "目に見える（誰にでも開いている）",
				"de": "Sichtbar (offen fГјr alle)",
				"zh": "еЏЇи§Ѓпј€еђ‘ж‰Ђжњ‰дєєејЂж”ѕпј‰",
				"nl": "Zichtbaar (open voor iedereen)",
				"pl": "Widoczne (otwarte dla wszystkich)",
				"hu": "LГЎthatГі (nyitott mindenki szГЎmГЎra)"
			},
			"Enable Chat": {
				"pt": "Ativar bate-papo",
				"es": "Habilitar chat",
				"ru": "Включить чат",
				"fr": "Activer discuter",
				"ja": "гѓЃгѓЈгѓѓгѓ€г‚’жњ‰еЉ№гЃ«гЃ™г‚‹",
				"de": "aktivieren Sie chatten",
				"zh": "启用聊天",
				"nl": "Chat inschakelen",
				"pl": "WЕ‚Д…cz czat",
				"hu": "a csevegГ©st"
			},
			"Play Alone": {
				"pt": "Jogar Sozinho",
				"es": "Jugar Solo",
				"ru": "Играть в одиночку",
				"fr": "Jouez Seul",
				"ja": "一人でプレイ",
				"de": "Alleine Spielen",
				"zh": "独自玩耍",
				"nl": "Speel Alleen",
				"pl": "Zagraj sam",
				"hu": "JГЎtssz egyedГјl"
			}
			// todo: it, tr, th, sv, ar, fi, nb, da, sv, he, cs, ko, ro, vi, id, nb, el, sk, bg, lt, sl, hr
			// todo: Connecting, Offline mode, input placeholder, Notifications
		};

		var setLanguage = function(lang) {
			language = lang
		};

		var getLanguage = function() {
			if(window.navigator && navigator.language && navigator.language.length >= 2) {
				return navigator.language.substr(0, 2).toLowerCase();
			} else {
				return "en";
			}
		};

		var get = function(text, lang) {
			if(typeof lang === "undefined") lang = language;
			var row = strings[text];
			if(row == undefined) return text;
			var string = row[lang];
			if(string == undefined) return text;
			return string;
		};

		var perform = function(lang) {
			if(typeof lang === "undefined") lang = language;
			$(".translate").each(function(i, ele) {
				var th = $(this);
				if(ele.tagName && ele.tagName.toLowerCase() == "input") {
					if(typeof ele.placeholder != "undefined") {
						th.attr("placeholder", get(th.attr("placeholder"), lang))
					}
				} else {
					th.text(get(th.text(), lang));
				}
			});
		};

		var language = getLanguage();

		return {
			setLanguage: setLanguage,
			getLanguage: getLanguage,
			get: get,
			perform: perform
		};
	})();

	Translation.perform();















// AudioEngine classes

////////////////////////////////////////////////////////////////

	var AudioEngine = function() {
	};

	AudioEngine.prototype.init = function(cb) {
		this.volume = 0.6;
		this.sounds = {};
		return this;
	};

	AudioEngine.prototype.load = function(id, url, cb) {
	};

	AudioEngine.prototype.play = function() {
	};

	AudioEngine.prototype.stop = function() {
	};

	AudioEngine.prototype.setVolume = function(vol) {
		this.volume = vol;
	};


	AudioEngineWeb = function() {
		this.threshold = 10;
		this.worker = new Worker("/workerTimer.js"); //must be same origin
		var self = this;
		this.worker.onmessage = function(event)
			{
				if(event.data.args)
				if(event.data.args.action==0)
				{
					self.actualPlay(event.data.args.id, event.data.args.vol, event.data.args.time, event.data.args.part_id);
				}
				else
				{
					self.actualStop(event.data.args.id, event.data.args.time, event.data.args.part_id);
				}
			}
	};

	AudioEngineWeb.prototype = new AudioEngine();

	AudioEngineWeb.prototype.init = function(cb) {
		AudioEngine.prototype.init.call(this);

		this.context = new AudioContext();

		this.masterGain = this.context.createGain();
		this.masterGain.connect(this.context.destination);
		this.masterGain.gain.value = this.volume;

		this.limiterNode = this.context.createDynamicsCompressor();
		this.limiterNode.threshold.value = -10;
		this.limiterNode.knee.value = 0;
		this.limiterNode.ratio.value = 20;
		this.limiterNode.attack.value = 0;
		this.limiterNode.release.value = 0.1;
		this.limiterNode.connect(this.masterGain);

		// for synth mix
		this.pianoGain = this.context.createGain();
		this.pianoGain.gain.value = 0.5;
		this.pianoGain.connect(this.limiterNode);
		this.synthGain = this.context.createGain();
		this.synthGain.gain.value = 0.5;
		this.synthGain.connect(this.limiterNode);

		this.playings = {};

		if(cb) setTimeout(cb, 0);
		return this;
	};

	AudioEngineWeb.prototype.load = function(id, url, cb) {
		var audio = this;
		var req = new XMLHttpRequest();
		req.open("GET", url);
		req.responseType = "arraybuffer";
		req.addEventListener("readystatechange", function(evt) {
			if(req.readyState !== 4) return;
			try {
				audio.context.decodeAudioData(req.response, function(buffer) {
					audio.sounds[id] = buffer;
					if(cb) cb();
				});
			} catch(e) {
				/*throw new Error(e.message
					+ " / id: " + id
					+ " / url: " + url
					+ " / status: " + req.status
					+ " / ArrayBuffer: " + (req.response instanceof ArrayBuffer)
					+ " / byteLength: " + (req.response && req.response.byteLength ? req.response.byteLength : "undefined"));*/
				new Notification({id: "audio-download-error", title: "Problem", text: "For some reason, an audio download failed with a status of " + req.status + ". ",
					target: "#piano", duration: 10000});
			}
		});
		req.send();
	};

	AudioEngineWeb.prototype.actualPlay = function(id, vol, time, part_id) { //the old play(), but with time insted of delay_ms.
		if(!this.sounds.hasOwnProperty(id)) return;
		var source = this.context.createBufferSource();
		source.buffer = this.sounds[id];
		var gain = this.context.createGain();
		gain.gain.value = vol;
		source.connect(gain);
		gain.connect(this.pianoGain);
		source.start(time);
		// Patch from ste-art remedies stuttering under heavy load
		if(this.playings[id]) {
			var playing = this.playings[id];
			playing.gain.gain.setValueAtTime(playing.gain.gain.value, time);
			playing.gain.gain.linearRampToValueAtTime(0.0, time + 0.2);
			playing.source.stop(time + 0.21);
			if(enableSynth && playing.voice) {
				playing.voice.stop(time);
			}
		}
		this.playings[id] = {"source": source, "gain": gain, "part_id": part_id};

		if(enableSynth) {
			this.playings[id].voice = new synthVoice(id, time);
		}
	}

	AudioEngineWeb.prototype.play = function(id, vol, delay_ms, part_id)
	{
		if(!this.sounds.hasOwnProperty(id)) return;
		var time = this.context.currentTime + (delay_ms / 1000); //calculate time on note receive.
		var delay = delay_ms - this.threshold;
		if(delay<=0) this.actualPlay(id, vol, time, part_id);
		else {
			this.worker.postMessage({delay:delay,args:{action:0/*play*/,id:id, vol:vol, time:time, part_id:part_id}}); // but start scheduling right before play.
		}
	}

	AudioEngineWeb.prototype.actualStop = function(id, time, part_id) {
		if(this.playings.hasOwnProperty(id) && this.playings[id] && this.playings[id].part_id === part_id) {
			var gain = this.playings[id].gain.gain;
			gain.setValueAtTime(gain.value, time);
			gain.linearRampToValueAtTime(gain.value * 0.1, time + 0.16);
			gain.linearRampToValueAtTime(0.0, time + 0.4);
			this.playings[id].source.stop(time + 0.41);


			if(this.playings[id].voice) {
				this.playings[id].voice.stop(time);
			}

			this.playings[id] = null;
		}
	};

	AudioEngineWeb.prototype.stop = function(id, delay_ms, part_id) {
			var time = this.context.currentTime + (delay_ms / 1000);
			var delay = delay_ms - this.threshold;
			if(delay<=0) this.actualStop(id, time, part_id);
			else {
				this.worker.postMessage({delay:delay,args:{action:1/*stop*/, id:id, time:time, part_id:part_id}});
			}
	};

	AudioEngineWeb.prototype.setVolume = function(vol) {
		AudioEngine.prototype.setVolume.call(this, vol);
		this.masterGain.gain.value = this.volume;
	};















// VolumeSlider inst

////////////////////////////////////////////////////////////////

	var VolumeSlider = function(ele, cb) {
		this.rootElement = ele;
		this.cb = cb;
		var range = document.createElement("input");
		try {
			range.type = "range";
		} catch(e) {
			// hello, IE9
		}
		if(range.min !== undefined) {
			this.range = range;
			this.rootElement.appendChild(range);
			range.className = "volume-slider";
			range.min = "0.0";
			range.max = "1.0";
			range.step = "0.01";
			$(range).on("change", function(evt) {
				cb(range.value);
			});
		} else {
			if(window.console) console.log("warn: no slider");
			// todo
		}
	};

	VolumeSlider.prototype.set = function(v) {
		if(this.range !== undefined) {
			this.range.value = v;
		} else {
			// todo
		}
	};



















// Renderer classes

////////////////////////////////////////////////////////////////

	var Renderer = function() {
	};

	Renderer.prototype.init = function(piano) {
		this.piano = piano;
		this.resize();
		return this;
	};

	Renderer.prototype.resize = function(width, height) {
		if(typeof width == "undefined") width = $(this.piano.rootElement).width();
		if(typeof height == "undefined") height = Math.floor(width * 0.2);
		$(this.piano.rootElement).css({"height": height + "px", marginTop: Math.floor($(window).height() / 2 - height / 2) + "px"});
		this.width = width;
		this.height = height;
	};

	Renderer.prototype.visualize = function(key, color) {
	};




	var DOMRenderer = function() {
		Renderer.call(this);
	};

	DOMRenderer.prototype = new Renderer();

	DOMRenderer.prototype.init = function(piano) {
		// create keys in dom
		for(var i in piano.keys) {
			if(!piano.keys.hasOwnProperty(i)) continue;
			var key = piano.keys[i];
			var ele = document.createElement("div");
			key.domElement = ele;
			piano.rootElement.appendChild(ele);
			// "key sharp cs cs2"
			ele.note = key.note;
			ele.id = key.note;
			ele.className = "key " + (key.sharp ? "sharp " : " ") + key.baseNote + " " + key.note + " loading";
			var table = $('<table width="100%" height="100%" style="pointer-events:none"></table>');
			var td = $('<td valign="bottom"></td>');
			table.append(td);
			td.valign = "bottom";
			$(ele).append(table);
		}
		// add event listeners
		var mouse_down = false;
		$(piano.rootElement).mousedown(function(event) {
			// todo: IE10 doesn't support the pointer-events css rule on the "blips"
			var ele = event.target;
			if($(ele).hasClass("key") && piano.keys.hasOwnProperty(ele.note)) {
				var key = piano.keys[ele.note];
				press(key.note);
				mouse_down = true;
				event.stopPropagation();
			};
			//event.preventDefault();
		});
		piano.rootElement.addEventListener("touchstart", function(event) {
			for(var i in event.changedTouches) {
				var ele = event.changedTouches[i].target;
				if($(ele).hasClass("key") && piano.keys.hasOwnProperty(ele.note)) {
					var key = piano.keys[ele.note];
					press(key.note);
					mouse_down = true;
					event.stopPropagation();
				}
			}
			//event.preventDefault();
		}, false);
		$(window).mouseup(function(event) {
			mouse_down = false;
		});
		/*$(piano.rootElement).mouseover(function(event) {
			if(!mouse_down) return;
			var ele = event.target;
			if($(ele).hasClass("key") && piano.keys.hasOwnProperty(ele.note)) {
				var key = piano.keys[ele.note];
				press(key.note);
			}
		});*/

		Renderer.prototype.init.call(this, piano);
		return this;
	};

	DOMRenderer.prototype.resize = function(width, height) {
		Renderer.prototype.resize.call(this, width, height);
	};

	DOMRenderer.prototype.visualize = function(key, color) {
		var k = $(key.domElement);
		k.addClass("play");
		setTimeout(function(){
			k.removeClass("play");
		}, 100);
		// "blips"
		var d = $('<div style="width:100%;height:10%;margin:0;padding:0">&nbsp;</div>');
		d.css("background", color);
		k.find("td").append(d);
		d.fadeOut(1000, function(){
			d.remove();
		});
	};




	var CanvasRenderer = function() {
		Renderer.call(this);
	};

	CanvasRenderer.prototype = new Renderer();

	CanvasRenderer.prototype.init = function(piano) {
		this.canvas = document.createElement("canvas");
		this.ctx = this.canvas.getContext("2d");
		piano.rootElement.appendChild(this.canvas);

		Renderer.prototype.init.call(this, piano); // calls resize()

		// create render loop
		var self = this;
		var render = function() {
			self.redraw();
			requestAnimationFrame(render);
		};
		requestAnimationFrame(render);

		// add event listeners
		var mouse_down = false;
		var last_key = null;
		$(piano.rootElement).mousedown(function(event) {
			mouse_down = true;
			//event.stopPropagation();
			event.preventDefault();

			var pos = CanvasRenderer.translateMouseEvent(event);
			var hit = self.getHit(pos.x, pos.y);
			if(hit) {
				press(hit.key.note, hit.v);
				last_key = hit.key;
			}
		});
		piano.rootElement.addEventListener("touchstart", function(event) {
			mouse_down = true;
			//event.stopPropagation();
			event.preventDefault();
			for(var i in event.changedTouches) {
				var pos = CanvasRenderer.translateMouseEvent(event.changedTouches[i]);
				var hit = self.getHit(pos.x, pos.y);
				if(hit) {
					press(hit.key.note, hit.v);
					last_key = hit.key;
				}
			}
		}, false);
		$(window).mouseup(function(event) {
			if(last_key) {
				release(last_key.note);
			}
			mouse_down = false;
			last_key = null;
		});
		/*$(piano.rootElement).mousemove(function(event) {
			if(!mouse_down) return;
			var pos = CanvasRenderer.translateMouseEvent(event);
			var hit = self.getHit(pos.x, pos.y);
			if(hit && hit.key != last_key) {
				press(hit.key.note, hit.v);
				last_key = hit.key;
			}
		});*/

		return this;
	};

	CanvasRenderer.prototype.resize = function(width, height) {
		Renderer.prototype.resize.call(this, width, height);
		if(this.width < 52 * 2) this.width = 52 * 2;
		if(this.height < this.width * 0.2) this.height = Math.floor(this.width * 0.2);
		this.canvas.width = this.width;
		this.canvas.height = this.height;

		// calculate key sizes
		this.whiteKeyWidth = Math.floor(this.width / 52);
		this.whiteKeyHeight = Math.floor(this.height * 0.9);
		this.blackKeyWidth = Math.floor(this.whiteKeyWidth * 0.75);
		this.blackKeyHeight = Math.floor(this.height * 0.5);

		this.blackKeyOffset = Math.floor(this.whiteKeyWidth - (this.blackKeyWidth / 2));
		this.keyMovement = Math.floor(this.whiteKeyHeight * 0.015);

		this.whiteBlipWidth = Math.floor(this.whiteKeyWidth * 0.7);
		this.whiteBlipHeight = Math.floor(this.whiteBlipWidth * 0.8);
		this.whiteBlipX = Math.floor((this.whiteKeyWidth - this.whiteBlipWidth) / 2);
		this.whiteBlipY = Math.floor(this.whiteKeyHeight - this.whiteBlipHeight * 1.2);
		this.blackBlipWidth = Math.floor(this.blackKeyWidth * 0.7);
		this.blackBlipHeight = Math.floor(this.blackBlipWidth * 0.8);
		this.blackBlipY = Math.floor(this.blackKeyHeight - this.blackBlipHeight * 1.2);
		this.blackBlipX = Math.floor((this.blackKeyWidth - this.blackBlipWidth) / 2);

		// prerender white key
		this.whiteKeyRender = document.createElement("canvas");
		this.whiteKeyRender.width = this.whiteKeyWidth;
		this.whiteKeyRender.height = this.height + 10;
		var ctx = this.whiteKeyRender.getContext("2d");
		if(ctx.createLinearGradient) {
			var gradient = ctx.createLinearGradient(0, 0, 0, this.whiteKeyHeight);
			gradient.addColorStop(0, "#eee");
			gradient.addColorStop(0.75, "#fff");
			gradient.addColorStop(1, "#dad4d4");
			ctx.fillStyle = gradient;
		} else {
			ctx.fillStyle = "#fff";
		}
		ctx.strokeStyle = "#000";
		ctx.lineJoin = "round";
		ctx.lineCap = "round";
		ctx.lineWidth = 10;
		ctx.strokeRect(ctx.lineWidth / 2, ctx.lineWidth / 2, this.whiteKeyWidth - ctx.lineWidth, this.whiteKeyHeight - ctx.lineWidth);
		ctx.lineWidth = 4;
		ctx.fillRect(ctx.lineWidth / 2, ctx.lineWidth / 2, this.whiteKeyWidth - ctx.lineWidth, this.whiteKeyHeight - ctx.lineWidth);

		// prerender black key
		this.blackKeyRender = document.createElement("canvas");
		this.blackKeyRender.width = this.blackKeyWidth + 10;
		this.blackKeyRender.height = this.blackKeyHeight + 10;
		var ctx = this.blackKeyRender.getContext("2d");
		if(ctx.createLinearGradient) {
			var gradient = ctx.createLinearGradient(0, 0, 0, this.blackKeyHeight);
			gradient.addColorStop(0, "#000");
			gradient.addColorStop(1, "#444");
			ctx.fillStyle = gradient;
		} else {
			ctx.fillStyle = "#000";
		}
		ctx.strokeStyle = "#222";
		ctx.lineJoin = "round";
		ctx.lineCap = "round";
		ctx.lineWidth = 8;
		ctx.strokeRect(ctx.lineWidth / 2, ctx.lineWidth / 2, this.blackKeyWidth - ctx.lineWidth, this.blackKeyHeight - ctx.lineWidth);
		ctx.lineWidth = 4;
		ctx.fillRect(ctx.lineWidth / 2, ctx.lineWidth / 2, this.blackKeyWidth - ctx.lineWidth, this.blackKeyHeight - ctx.lineWidth);

		// prerender shadows
		this.shadowRender = [];
		var y = -this.canvas.height * 2;
		for(var j = 0; j < 2; j++) {
			var canvas = document.createElement("canvas");
			this.shadowRender[j] = canvas;
			canvas.width = this.canvas.width;
			canvas.height = this.canvas.height;
			var ctx = canvas.getContext("2d");
			var sharp = j ? true : false;
			ctx.lineJoin = "round";
			ctx.lineCap = "round";
			ctx.lineWidth = 1;
			ctx.shadowColor = "rgba(0, 0, 0, 0.5)";
			ctx.shadowBlur = this.keyMovement * 3;
			ctx.shadowOffsetY = -y + this.keyMovement;
			if(sharp) {
				ctx.shadowOffsetX = this.keyMovement;
			} else {
				ctx.shadowOffsetX = 0;
				ctx.shadowOffsetY = -y + this.keyMovement;
			}
			for(var i in this.piano.keys) {
				if(!this.piano.keys.hasOwnProperty(i)) continue;
				var key = this.piano.keys[i];
				if(key.sharp != sharp) continue;

				if(key.sharp) {
					ctx.fillRect(this.blackKeyOffset + this.whiteKeyWidth * key.spatial + ctx.lineWidth / 2,
						y + ctx.lineWidth / 2,
						this.blackKeyWidth - ctx.lineWidth, this.blackKeyHeight - ctx.lineWidth);
				} else {
					ctx.fillRect(this.whiteKeyWidth * key.spatial + ctx.lineWidth / 2,
						y + ctx.lineWidth / 2,
						this.whiteKeyWidth - ctx.lineWidth, this.whiteKeyHeight - ctx.lineWidth);
				}
			}
		}

		// update key rects
		for(var i in this.piano.keys) {
			if(!this.piano.keys.hasOwnProperty(i)) continue;
			var key = this.piano.keys[i];
			if(key.sharp) {
				key.rect = new Rect(this.blackKeyOffset + this.whiteKeyWidth * key.spatial, 0,
					this.blackKeyWidth, this.blackKeyHeight);
			} else {
				key.rect = new Rect(this.whiteKeyWidth * key.spatial, 0,
					this.whiteKeyWidth, this.whiteKeyHeight);
			}
		}
	};

	CanvasRenderer.prototype.visualize = function(key, color) {
		key.timePlayed = Date.now();
		key.blips.push({"time": key.timePlayed, "color": color});
	};

	CanvasRenderer.prototype.redraw = function() {
		var now = Date.now();
		var timeLoadedEnd = now - 1000;
		var timePlayedEnd = now - 100;
		var timeBlipEnd = now - 1000;

		this.ctx.save();
		this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
		// draw all keys
		for(var j = 0; j < 2; j++) {
			this.ctx.globalAlpha = 1.0;
			this.ctx.drawImage(this.shadowRender[j], 0, 0);
			var sharp = j ? true : false;
			for(var i in this.piano.keys) {
				if(!this.piano.keys.hasOwnProperty(i)) continue;
				var key = this.piano.keys[i];
				if(key.sharp != sharp) continue;

				if(!key.loaded) {
					this.ctx.globalAlpha = 0.2;
				} else if(key.timeLoaded > timeLoadedEnd) {
					this.ctx.globalAlpha = ((now - key.timeLoaded) / 1000) * 0.8 + 0.2;
				} else {
					this.ctx.globalAlpha = 1.0;
				}
				var y = 0;
				if(key.timePlayed > timePlayedEnd) {
					y = Math.floor(this.keyMovement - (((now - key.timePlayed) / 100) * this.keyMovement));
				}
				var x = Math.floor(key.sharp ? this.blackKeyOffset + this.whiteKeyWidth * key.spatial
					: this.whiteKeyWidth * key.spatial);
				var image = key.sharp ? this.blackKeyRender : this.whiteKeyRender;
				this.ctx.drawImage(image, x, y);

				// render blips
				if(key.blips.length) {
					var alpha = this.ctx.globalAlpha;
					var w, h;
					if(key.sharp) {
						x += this.blackBlipX;
						y = this.blackBlipY;
						w = this.blackBlipWidth;
						h = this.blackBlipHeight;
					} else {
						x += this.whiteBlipX;
						y = this.whiteBlipY;
						w = this.whiteBlipWidth;
						h = this.whiteBlipHeight;
					}
					for(var b = 0; b < key.blips.length; b++) {
						var blip = key.blips[b];
						if(blip.time > timeBlipEnd) {
							this.ctx.fillStyle = blip.color;
							this.ctx.globalAlpha = alpha - ((now - blip.time) / 1000);
							this.ctx.fillRect(x, y, w, h);
						} else {
							key.blips.splice(b, 1);
							--b;
						}
						y -= Math.floor(h * 1.1);
					}
				}
			}
		}
		this.ctx.restore();
	};

	CanvasRenderer.prototype.getHit = function(x, y) {
		for(var j = 0; j < 2; j++) {
			var sharp = j ? false : true; // black keys first
			for(var i in this.piano.keys) {
				if(!this.piano.keys.hasOwnProperty(i)) continue;
				var key = this.piano.keys[i];
				if(key.sharp != sharp) continue;
				if(key.rect.contains(x, y)) {
					var v = y / (key.sharp ? this.blackKeyHeight : this.whiteKeyHeight);
					v += 0.25;
					v *= DEFAULT_VELOCITY;
					if(v > 1.0) v = 1.0;
					return {"key": key, "v": v};
				}
			}
		}
		return null;
	};


	CanvasRenderer.isSupported = function() {
		var canvas = document.createElement("canvas");
		return !!(canvas.getContext && canvas.getContext("2d"));
	};

	CanvasRenderer.translateMouseEvent = function(evt) {
		var element = evt.target;
		var offx = 0;
		var offy = 0;
		do {
			if(!element) break; // wtf, wtf?
			offx += element.offsetLeft;
			offy += element.offsetTop;
		} while(element = element.offsetParent);
		return {
			x: evt.pageX - offx,
			y: evt.pageY - offy
		}
	};












// Pianoctor

////////////////////////////////////////////////////////////////

	var PianoKey = function(note, octave) {
		this.note = note + octave;
		this.baseNote = note;
		this.octave = octave;
		this.sharp = note.indexOf("s") != -1;
		this.loaded = false;
		this.timeLoaded = 0;
		this.domElement = null;
		this.timePlayed = 0;
		this.blips = [];
	};

	var Piano = function(rootElement) {

		var piano = this;
		piano.rootElement = rootElement;
		piano.keys = {};

		var white_spatial = 0;
		var black_spatial = 0;
		var black_it = 0;
		var black_lut = [2, 1, 2, 1, 1];
		var addKey = function(note, octave) {
			var key = new PianoKey(note, octave);
			piano.keys[key.note] = key;
			if(key.sharp) {
				key.spatial = black_spatial;
				black_spatial += black_lut[black_it % 5];
				++black_it;
			} else {
				key.spatial = white_spatial;
				++white_spatial;
			}
		}
		if(test_mode) {
			addKey("c", 2);
		} else {
			addKey("a", -1);
			addKey("as", -1);
			addKey("b", -1);
			var notes = "c cs d ds e f fs g gs a as b".split(" ");
			for(var oct = 0; oct < 7; oct++) {
				for(var i in notes) {
					addKey(notes[i], oct);
				}
			}
			addKey("c", 7);
		}


		var render_engine = CanvasRenderer.isSupported() ? CanvasRenderer : DOMRenderer;
		this.renderer = new render_engine().init(this);

		window.addEventListener("resize", function() {
			piano.renderer.resize();
		});


		window.AudioContext = window.AudioContext || window.webkitAudioContext || undefined;
		var audio_engine = AudioEngineWeb;

		this.audio = new audio_engine().init(function() {
			for(var i in piano.keys) {
				if(!piano.keys.hasOwnProperty(i)) continue;
				(function() {
					var key = piano.keys[i];
					piano.audio.load(key.note, gSoundPath + key.note + gSoundExt, function() {
						key.loaded = true;
						key.timeLoaded = Date.now();
						if(key.domElement) // todo: move this to renderer somehow
							$(key.domElement).removeClass("loading");
					});
				})();
			}
		});
	};

	Piano.prototype.play = function(note, vol, participant, delay_ms) {
		if(!this.keys.hasOwnProperty(note)) return;
		var key = this.keys[note];
		if(key.loaded) this.audio.play(key.note, vol, delay_ms, participant.id);
		if(typeof gMidiOutTest === "function") gMidiOutTest(key.note, vol * 100, delay_ms);
		var self = this;
		var jq_namediv = $(typeof participant == "undefined" ? null : participant.nameDiv);
		if(jq_namediv) {
			setTimeout(function() {
				self.renderer.visualize(key, typeof participant == "undefined" ? "yellow" : (participant.color || "#777"));
				jq_namediv.addClass("play");
				setTimeout(function() {
					jq_namediv.removeClass("play");
				}, 30);
			}, delay_ms);
		}
	};

	Piano.prototype.stop = function(note, participant, delay_ms) {
		if(!this.keys.hasOwnProperty(note)) return;
		var key = this.keys[note];
		if(key.loaded) this.audio.stop(key.note, delay_ms, participant.id);
		if(typeof gMidiOutTest === "function") gMidiOutTest(key.note, 0, delay_ms);
	};

	var gPiano = new Piano(document.getElementById("piano"));







	var gAutoSustain = true; //!(window.location.hash && window.location.hash.match(/^(?:#.+)*#sustain(?:#.+)*$/));
	var gSustain = false;

	var gHeldNotes = {};
	var gSustainedNotes = {};


	function press(id, vol) {
		if(!gClient.preventsPlaying() && gNoteQuota.spend(1)) {
			gHeldNotes[id] = true;
			gSustainedNotes[id] = true;
			gPiano.play(id, vol !== undefined ? vol : DEFAULT_VELOCITY, gClient.getOwnParticipant(), 0);
			gClient.startNote(id, vol);
		}
	}

	function release(id) {
		if(gHeldNotes[id]) {
			gHeldNotes[id] = false;
			if((gAutoSustain || gSustain) && !enableSynth) {
				gSustainedNotes[id] = true;
			} else {
				if(gNoteQuota.spend(1)) {
					gPiano.stop(id, gClient.getOwnParticipant(), 0);
					gClient.stopNote(id);
					gSustainedNotes[id] = false;
				}
			}
		}
	}

	function pressSustain() {
		gSustain = true;
	}

	function releaseSustain() {
		gSustain = false;
		if(!gAutoSustain) {
			for(var id in gSustainedNotes) {
				if(gSustainedNotes.hasOwnProperty(id) && gSustainedNotes[id] && !gHeldNotes[id]) {
					gSustainedNotes[id] = false;
					if(gNoteQuota.spend(1)) {
						gPiano.stop(id, gClient.getOwnParticipant(), 0);
						gClient.stopNote(id);
					}
				}
			}
		}
	}









// internet science

////////////////////////////////////////////////////////////////

	var channel_id = decodeURIComponent(window.location.pathname);
	if(channel_id.substr(0, 1) == "/") channel_id = channel_id.substr(1);
	if(channel_id == "") channel_id = "lobby";

	var wssport = window.location.hostname == "www.multiplayerpiano.com" ? 443 : 8080;
	var gClient = new Client("ws://" + window.location.hostname + ":" + wssport);
	gClient.setChannel(channel_id);
	gClient.start();


	// Setting status
	(function() {
		gClient.on("status", function(status) {
			$("#status").text(status);
		});
		gClient.on("count", function(count) {
			if(count > 0) {
				$("#status").html('<span class="number">'+count+'</span> '+(count==1? 'person is' : 'people are')+' playing');
				document.title = "Piano (" + count + ")";
			} else {
				document.title = "Multiplayer Piano";
			}
		});
	})();

	// Handle changes to participants
	(function() {
		gClient.on("participant added", function(part) {

			part.displayX = 150;
			part.displayY = 50;

			// add nameDiv
			var div = document.createElement("div");
			div.className = "name";
			div.participantId = part.id;
			div.textContent = part.name || "";
			div.style.backgroundColor = part.color || "#777";
			if(gClient.participantId === part.id) {
				$(div).addClass("me");
			}
			if(gClient.channel && gClient.channel.crown && gClient.channel.crown.participantId === part.id) {
				$(div).addClass("owner");
			}
			if(gPianoMutes.indexOf(part._id) !== -1) {
				$(part.nameDiv).addClass("muted-notes");
			}
			if(gChatMutes.indexOf(part._id) !== -1) {
				$(part.nameDiv).addClass("muted-chat");
			}
			div.style.display = "none";
			part.nameDiv = $("#names")[0].appendChild(div);
			$(part.nameDiv).fadeIn(2000);

			// sort names
			var arr = $("#names .name");
			arr.sort(function(a, b) {
				a = a.style.backgroundColor; // todo: sort based on user id instead
				b = b.style.backgroundColor;
				if (a > b) return 1;
				else if (a < b) return -1;
				else return 0;
			});
			$("#names").html(arr);

			// add cursorDiv
			if(gClient.participantId !== part.id || gSeeOwnCursor) {
				var div = document.createElement("div");
				div.className = "cursor";
				div.style.display = "none";
				part.cursorDiv = $("#cursors")[0].appendChild(div);
				$(part.cursorDiv).fadeIn(2000);

				var div = document.createElement("div");
				div.className = "name";
				div.style.backgroundColor = part.color || "#777"
				div.textContent = part.name || "";
				part.cursorDiv.appendChild(div);

			} else {
				part.cursorDiv = undefined;
			}
		});
		gClient.on("participant removed", function(part) {
			// remove nameDiv
			var nd = $(part.nameDiv);
			var cd = $(part.cursorDiv);
			cd.fadeOut(2000);
			nd.fadeOut(2000, function() {
				nd.remove();
				cd.remove();
				part.nameDiv = undefined;
				part.cursorDiv = undefined;
			});
		});
		gClient.on("participant update", function(part) {
			var name = part.name || "";
			var color = part.color || "#777";
			part.nameDiv.style.backgroundColor = color;
			part.nameDiv.textContent = name;
			$(part.cursorDiv)
			.find(".name")
			.text(name)
			.css("background-color", color);
		});
		gClient.on("ch", function(msg) {
			for(var id in gClient.ppl) {
				if(gClient.ppl.hasOwnProperty(id)) {
					var part = gClient.ppl[id];
					if(part.id === gClient.participantId) {
						$(part.nameDiv).addClass("me");
					} else {
						$(part.nameDiv).removeClass("me");
					}
					if(msg.ch.crown && msg.ch.crown.participantId === part.id) {
						$(part.nameDiv).addClass("owner");
						$(part.cursorDiv).addClass("owner");
					} else {
						$(part.nameDiv).removeClass("owner");
						$(part.cursorDiv).removeClass("owner");
					}
					if(gPianoMutes.indexOf(part._id) !== -1) {
						$(part.nameDiv).addClass("muted-notes");
					} else {
						$(part.nameDiv).removeClass("muted-notes");
					}
					if(gChatMutes.indexOf(part._id) !== -1) {
						$(part.nameDiv).addClass("muted-chat");
					} else {
						$(part.nameDiv).removeClass("muted-chat");
					}
				}
			}
		});
	})();


	// Handle changes to crown
	(function() {
		var jqcrown = $('<div id="crown"></div>').appendTo(document.body).hide();
		var jqcountdown = $('<span></span>').appendTo(jqcrown);
		var countdown_interval;
		jqcrown.click(function() {
			gClient.sendArray([{m: "chown", id: gClient.participantId}]);
		});
		gClient.on("ch", function(msg) {
			if(msg.ch.crown) {
				var crown = msg.ch.crown;
				if(!crown.participantId || !gClient.ppl[crown.participantId]) {
					var land_time = crown.time + 2000 - gClient.serverTimeOffset;
					var avail_time = crown.time + 15000 - gClient.serverTimeOffset;
					jqcountdown.text("");
					jqcrown.show();
					if(land_time - Date.now() <= 0) {
						jqcrown.css({"left": crown.endPos.x + "%", "top": crown.endPos.y + "%"});
					} else {
						jqcrown.css({"left": crown.startPos.x + "%", "top": crown.startPos.y + "%"});
						jqcrown.addClass("spin");
						jqcrown.animate({"left": crown.endPos.x + "%", "top": crown.endPos.y + "%"}, 2000, "linear", function() {
							jqcrown.removeClass("spin");
						});
					}
					clearInterval(countdown_interval);
					countdown_interval = setInterval(function() {
						var time = Date.now();
						if(time >= land_time) {
							var ms = avail_time - time;
							if(ms > 0) {
								jqcountdown.text(Math.ceil(ms / 1000) + "s");
							} else {
								jqcountdown.text("");
								clearInterval(countdown_interval);
							}
						}
					}, 1000);
				} else {
					jqcrown.hide();
				}
			} else {
				jqcrown.hide();
			}
		});
		gClient.on("disconnect", function() {
			jqcrown.fadeOut(2000);
		});
	})();


	// Playing notes
	gClient.on("n", function(msg) {
		var t = msg.t - gClient.serverTimeOffset + TIMING_TARGET - Date.now();
		var participant = gClient.findParticipantById(msg.p);
		if(gPianoMutes.indexOf(participant._id) !== -1)
			return;
		for(var i = 0; i < msg.n.length; i++) {
			var note = msg.n[i];
			var ms = t + (note.d || 0);
			if(ms < 0) {
				ms = 0;
			}
			else if(ms > 10000) continue;
			if(note.s) {
				gPiano.stop(note.n, participant, ms);
			} else {
				var vel = (typeof note.v !== "undefined")? parseFloat(note.v) : DEFAULT_VELOCITY;
				if(vel < 0) vel = 0; else if (vel > 1) vel = 1;
				gPiano.play(note.n, vel, participant, ms);
				if(enableSynth) {
					gPiano.stop(note.n, participant, ms + 1000);
				}
			}
		}
	});

	// Send cursor updates
	var mx = 0, last_mx = -10, my = 0, last_my = -10;
	setInterval(function() {
		if(Math.abs(mx - last_mx) > 0.1 || Math.abs(my - last_my) > 0.1) {
			last_mx = mx;
			last_my = my;
			gClient.sendArray([{m: "m", x: mx, y: my}]);
			var part = gClient.getOwnParticipant();
			if(part) {
				part.x = mx;
				part.y = my;
			}
		}
	}, 50);
	$(document).mousemove(function(event) {
		mx = ((event.pageX / $(window).width()) * 100).toFixed(2);
		my = ((event.pageY / $(window).height()) * 100).toFixed(2);
	});

	// Animate cursors
	setInterval(function() {
		for(var id in gClient.ppl) {
			if(!gClient.ppl.hasOwnProperty(id)) continue;
			var part = gClient.ppl[id];
			if(part.cursorDiv && (Math.abs(part.x - part.displayX) > 0.1 || Math.abs(part.y - part.displayY) > 0.1)) {
				part.displayX += (part.x - part.displayX) * 0.75;
				part.displayY += (part.y - part.displayY) * 0.75;
				part.cursorDiv.style.left = part.displayX + "%";
				part.cursorDiv.style.top = part.displayY + "%";
			}
		}
	}, 50);


	// Room settings button
	(function() {
		gClient.on("ch", function(msg) {
			if(gClient.isOwner()) {
				$("#room-settings-btn").show();
			} else {
				$("#room-settings-btn").hide();
			}
		});
		$("#room-settings-btn").click(function(evt) {
			if(gClient.channel && gClient.isOwner()) {
				var settings = gClient.channel.settings;
				openModal("#room-settings");
				setTimeout(function() {
					$("#room-settings .checkbox[name=visible]").prop("checked", settings.visible);
					$("#room-settings .checkbox[name=chat]").prop("checked", settings.chat);
					$("#room-settings .checkbox[name=crownsolo]").prop("checked", settings.crownsolo);
					$("#room-settings input[name=color]").val(settings.color);
				}, 100);
			}
		});
		$("#room-settings .submit").click(function() {
			var settings = {
				visible: $("#room-settings .checkbox[name=visible]").is(":checked"),
				chat: $("#room-settings .checkbox[name=chat]").is(":checked"),
				crownsolo: $("#room-settings .checkbox[name=crownsolo]").is(":checked"),
				color: $("#room-settings input[name=color]").val()
			};
			gClient.sendArray([{m: "chset", set: settings}]);
			closeModal();
		});
		$("#room-settings .drop-crown").click(function() {
			gClient.sendArray([{m: "chown"}]);
			closeModal();
		});
	})();

	// Handle notifications
	gClient.on("notification", function(msg) {
		new Notification(msg);
	});

	// Don't foget spin
	gClient.on("ch", function(msg) {
		var chidlo = msg.ch._id.toLowerCase();
		if(chidlo === "spin" || chidlo.substr(-5) === "/spin") {
			$("#piano").addClass("spin");
		} else {
			$("#piano").removeClass("spin");
		}
	});

	/*function eb() {
		if(gClient.channel && gClient.channel._id.toLowerCase() === "test/fishing") {
			ebsprite.start(gClient);
		} else {
			ebsprite.stop();
		}
	}
	if(ebsprite) {
		gClient.on("ch", eb);
		eb();
	}*/

	// Crownsolo notice
	gClient.on("ch", function(msg) {
		if(msg.ch.settings.crownsolo) {
			if($("#crownsolo-notice").length == 0) {
				$('<div id="crownsolo-notice">').text('This room is set to "only the owner can play."').appendTo("body").fadeIn(1000);
			}
		} else {
			$("#crownsolo-notice").remove();
		}
	});
	gClient.on("disconnect", function() {
		$("#crownsolo-notice").remove();
	});


	// Background color
	(function() {
		var old_color1 = new Color("#ecfafd");
		var old_color2 = new Color("#ecfafd");
		function setColor(hex) {
			var color1 = new Color(hex);
			var color2 = new Color(hex);
			color2.add(-0x40, -0x40, -0x40);

			var bottom = document.getElementById("bottom");

			var duration = 500;
			var step = 0;
			var steps = 30;
			var step_ms = duration / steps;
			var difference = new Color(color1.r, color1.g, color1.b);
			difference.r -= old_color1.r;
			difference.g -= old_color1.g;
			difference.b -= old_color1.b;
			var inc = new Color(difference.r / steps, difference.g / steps, difference.b / steps);
			var iv;
			iv = setInterval(function() {
				old_color1.add(inc.r, inc.g, inc.b);
				old_color2.add(inc.r, inc.g, inc.b);
				document.body.style.background = "radial-gradient(ellipse at center, "+old_color1.toHexa()+" 0%,"+old_color2.toHexa()+" 100%)";
				bottom.style.background = old_color2.toHexa();
				if(++step >= steps) {
					clearInterval(iv);
					old_color1 = color1;
					old_color2 = color2;
					document.body.style.background = "radial-gradient(ellipse at center, "+color1.toHexa()+" 0%,"+color2.toHexa()+" 100%)";
					bottom.style.background = color2.toHexa();
				}
			}, step_ms);
		}

		setColor("#ecfafd");

		gClient.on("ch", function(ch) {
			if(ch.ch.settings) {
				if(ch.ch.settings.color) {
					setColor(ch.ch.settings.color);
				} else {
					setColor("#ecfafd");
				}
			}
		});
	})();






	var gPianoMutes = [];

	var gChatMutes = [];



















	var volume_slider = new VolumeSlider(document.getElementById("volume"), function(v) {
		gPiano.audio.setVolume(v);
		if(window.localStorage) localStorage.volume = v;
	});
	volume_slider.set(gPiano.audio.volume);

	var Note = function(note, octave) {
		this.note = note;
		this.octave = octave || 0;
	};



	var n = function(a, b) { return {note: new Note(a, b), held: false}; };
	var key_binding = {
		65: n("gs"),
		90: n("a"),
		83: n("as"),
		88: n("b"),
		67: n("c", 1),
		70: n("cs", 1),
		86: n("d", 1),
		71: n("ds", 1),
		66: n("e", 1),
		78: n("f", 1),
		74: n("fs", 1),
		77: n("g", 1),
		75: n("gs", 1),
		188: n("a", 1),
		76: n("as", 1),
		190: n("b", 1),
		191: n("c", 2),
		222: n("cs", 2),

		49: n("gs", 1),
		81: n("a", 1),
		50: n("as", 1),
		87: n("b", 1),
		69: n("c", 2),
		52: n("cs", 2),
		82: n("d", 2),
		53: n("ds", 2),
		84: n("e", 2),
		89: n("f", 2),
		55: n("fs", 2),
		85: n("g", 2),
		56: n("gs", 2),
		73: n("a", 2),
		57: n("as", 2),
		79: n("b", 2),
		80: n("c", 3),
		189: n("cs", 3),
		219: n("d", 3),
		187: n("ds", 3),
		221: n("e", 3)
	};

	var capsLockKey = false;

	var transpose_octave = 0;

	function handleKeyDown(evt) {
		//console.log(evt);
		var code = parseInt(evt.keyCode);
		if(key_binding[code] !== undefined) {
			var binding = key_binding[code];
			if(!binding.held) {
				binding.held = true;

				var note = binding.note;
				var octave = 1 + note.octave + transpose_octave;
				if(evt.shiftKey) ++octave;
				else if(capsLockKey || evt.ctrlKey) --octave;
				note = note.note + octave;
				var vol = velocityFromMouseY();
				press(note, vol);
			}

			if(++gKeyboardSeq == 3) {
				gKnowsYouCanUseKeyboard = true;
				if(window.gKnowsYouCanUseKeyboardTimeout) clearTimeout(gKnowsYouCanUseKeyboardTimeout);
				if(localStorage) localStorage.knowsYouCanUseKeyboard = true;
				if(window.gKnowsYouCanUseKeyboardNotification) gKnowsYouCanUseKeyboardNotification.close();
			}

			evt.preventDefault();
			evt.stopPropagation();
			return false;
		} else if(code == 20) { // Caps Lock
			capsLockKey = true;
			evt.preventDefault();
		} else if(code === 0x20) { // Space Bar
			pressSustain();
			evt.preventDefault();
		} else if((code === 38 || code === 39) && transpose_octave < 3) {
			++transpose_octave;
		} else if((code === 40 || code === 37) && transpose_octave > -2) {
			--transpose_octave;
		} else if(code == 9) { // Tab (don't tab away from the piano)
			evt.preventDefault();
		} else if(code == 8) { // Backspace (don't navigate Back)
			gAutoSustain = !gAutoSustain;
			evt.preventDefault();
		}
	};

	function handleKeyUp(evt) {
		var code = parseInt(evt.keyCode);
		if(key_binding[code] !== undefined) {
			var binding = key_binding[code];
			if(binding.held) {
				binding.held = false;

				var note = binding.note;
				var octave = 1 + note.octave + transpose_octave;
				if(evt.shiftKey) ++octave;
				else if(capsLockKey || evt.ctrlKey) --octave;
				note = note.note + octave;
				release(note);
			}

			evt.preventDefault();
			evt.stopPropagation();
			return false;
		} else if(code == 20) { // Caps Lock
			capsLockKey = false;
			evt.preventDefault();
		} else if(code === 0x20) { // Space Bar
			releaseSustain();
			evt.preventDefault();
		}
	};

	function handleKeyPress(evt) {
		evt.preventDefault();
		evt.stopPropagation();
		if(evt.keyCode == 27 || evt.keyCode == 13) {
			//$("#chat input").focus();
		}
		return false;
	};

	var recapListener = function(evt) {
		captureKeyboard();
	};

	function captureKeyboard() {
		$("#piano").off("mousedown", recapListener);
		$("#piano").off("touchstart", recapListener);
		$(document).on("keydown", handleKeyDown );
		$(document).on("keyup", handleKeyUp);
		$(window).on("keypress", handleKeyPress );
	};

	function releaseKeyboard() {
		$(document).off("keydown", handleKeyDown );
		$(document).off("keyup", handleKeyUp);
		$(window).off("keypress", handleKeyPress );
		$("#piano").on("mousedown", recapListener);
		$("#piano").on("touchstart", recapListener);
	};

	captureKeyboard();


	var velocityFromMouseY = function() {
		return 0.1 + (my / 100) * 0.6;
	};





	// NoteQuota
	var gNoteQuota = (function() {
		var last_rat = 0;
		var nqjq = $("#quota .value");
		setInterval(function() {
			gNoteQuota.tick();
		}, 2000);
		return new NoteQuota(function(points) {
			// update UI
			var rat = (points / this.max) * 100;
			if(rat <= last_rat)
				nqjq.stop(true, true).css("width", rat.toFixed(0) + "%");
			else
				nqjq.stop(true, true).animate({"width": rat.toFixed(0) + "%"}, 2000, "linear");
			last_rat = rat;
		});
	})();
	gClient.on("nq", function(nq_params) {
		gNoteQuota.setParams(nq_params);
	});
	gClient.on("disconnect", function() {
		gNoteQuota.setParams(NoteQuota.PARAMS_OFFLINE);
	});



	// click participant names
	(function() {
		var ele = document.getElementById("names");
		var touchhandler = function(e) {
			var target_jq = $(e.target);
			if(target_jq.hasClass("name")) {
				target_jq.addClass("play");
				if(e.target.participantId == gClient.participantId) {
					openModal("#rename", "input[name=name]");
					setTimeout(function() {
						$("#rename input[name=name]").val(gClient.ppl[gClient.participantId].name);
						$("#rename input[name=color]").val(gClient.ppl[gClient.participantId].color);
					}, 100);
				} else if(e.target.participantId) {
					var id = e.target.participantId;
					var part = gClient.ppl[id] || null;
					if(part) {
						participantMenu(part);
						e.stopPropagation();
					}
				}
			}
		};
		ele.addEventListener("mousedown", touchhandler);
		ele.addEventListener("touchstart", touchhandler);
		var releasehandler = function(e) {
			$("#names .name").removeClass("play");
		};
		document.body.addEventListener("mouseup", releasehandler);
		document.body.addEventListener("touchend", releasehandler);

		var removeParticipantMenus = function() {
			$(".participant-menu").remove();
			$(".participantSpotlight").hide();
			document.removeEventListener("mousedown", removeParticipantMenus);
			document.removeEventListener("touchstart", removeParticipantMenus);
		};

		var participantMenu = function(part) {
			if(!part) return;
			removeParticipantMenus();
			document.addEventListener("mousedown", removeParticipantMenus);
			document.addEventListener("touchstart", removeParticipantMenus);
			$("#" + part.id).find(".enemySpotlight").show();
			var menu = $('<div class="participant-menu"></div>');
			$("body").append(menu);
			// move menu to name position
			var jq_nd = $(part.nameDiv);
			var pos = jq_nd.position();
			menu.css({
				"top": pos.top + jq_nd.height() + 15,
				"left": pos.left + 6,
				"background": part.color || "black"
			});
			menu.on("mousedown touchstart", function(evt) {
				evt.stopPropagation();
				var target = $(evt.target);
				if(target.hasClass("menu-item")) {
					target.addClass("clicked");
					menu.fadeOut(200, function() {
						removeParticipantMenus();
					});
				}
			});
			// this spaces stuff out but also can be used for informational
			$('<div class="info"></div>').appendTo(menu).text(part._id);
			// add menu items
			if(gPianoMutes.indexOf(part._id) == -1) {
				$('<div class="menu-item">Mute Notes</div>').appendTo(menu)
				.on("mousedown touchstart", function(evt) {
					gPianoMutes.push(part._id);
					$(part.nameDiv).addClass("muted-notes");
				});
			} else {
				$('<div class="menu-item">Unmute Notes</div>').appendTo(menu)
				.on("mousedown touchstart", function(evt) {
					var i;
					while((i = gPianoMutes.indexOf(part._id)) != -1)
						gPianoMutes.splice(i, 1);
					$(part.nameDiv).removeClass("muted-notes");
				});
			}
			if(gChatMutes.indexOf(part._id) == -1) {
				$('<div class="menu-item">Mute Chat</div>').appendTo(menu)
				.on("mousedown touchstart", function(evt) {
					gChatMutes.push(part._id);
					$(part.nameDiv).addClass("muted-chat");
				});
			} else {
				$('<div class="menu-item">Unmute Chat</div>').appendTo(menu)
				.on("mousedown touchstart", function(evt) {
					var i;
					while((i = gChatMutes.indexOf(part._id)) != -1)
						gChatMutes.splice(i, 1);
					$(part.nameDiv).removeClass("muted-chat");
				});
			}
			if(!(gPianoMutes.indexOf(part._id) >= 0) || !(gChatMutes.indexOf(part._id) >= 0)) {
				$('<div class="menu-item">Mute Completely</div>').appendTo(menu)
				.on("mousedown touchstart", function(evt) {
					gPianoMutes.push(part._id);
					gChatMutes.push(part._id);
					$(part.nameDiv).addClass("muted-notes");
					$(part.nameDiv).addClass("muted-chat");
				});
			}
			if((gPianoMutes.indexOf(part._id) >= 0) || (gChatMutes.indexOf(part._id) >= 0)) {
				$('<div class="menu-item">Unmute Completely</div>').appendTo(menu)
				.on("mousedown touchstart", function(evt) {
					var i;
					while((i = gPianoMutes.indexOf(part._id)) != -1)
						gPianoMutes.splice(i, 1);
					while((i = gChatMutes.indexOf(part._id)) != -1)
						gChatMutes.splice(i, 1);
					$(part.nameDiv).removeClass("muted-notes");
					$(part.nameDiv).removeClass("muted-chat");
				});
			}
			if(gClient.isOwner()) {
				$('<div class="menu-item give-crown">Give Crown</div>').appendTo(menu)
				.on("mousedown touchstart", function(evt) {
					gClient.sendArray([{m: "chown", id: part.id}]);
				});
				$('<div class="menu-item kickban">Kickban</div>').appendTo(menu)
				.on("mousedown touchstart", function(evt) {
					var minutes = prompt("How many minutes? (0-60)", "30");
					if(minutes === null) return;
					minutes = parseFloat(minutes) || 0;
					var ms = minutes * 60 * 1000;
					gClient.sendArray([{m: "kickban", _id: part._id, ms: ms}]);
				});
			}
			menu.fadeIn(100);
		};
	})();
















// Notification class

////////////////////////////////////////////////////////////////

	var Notification = function(par) {
		EventEmitter.call(this);

		var par = par || {};

		this.id = "Notification-" + (par.id || Math.random());
		this.title = par.title || "";
		this.text = par.text || "";
		this.html = par.html || "";
		this.target = $(par.target || "#piano");
		this.duration = par.duration || 30000;
		this["class"] = par["class"] || "classic";

		var self = this;
		var eles = $("#" + this.id);
		if(eles.length > 0) {
			eles.remove();
		}
		this.domElement = $('<div class="notification"><div class="notification-body"><div class="title"></div>' +
			'<div class="text"></div></div><div class="x">x</div></div>');
		this.domElement[0].id = this.id;
		this.domElement.addClass(this["class"]);
		this.domElement.find(".title").text(this.title);
		if(this.text.length > 0) {
			this.domElement.find(".text").text(this.text);
		} else if(this.html instanceof HTMLElement) {
			this.domElement.find(".text")[0].appendChild(this.html);
		} else if(this.html.length > 0) {
			this.domElement.find(".text").html(this.html);
		}
		document.body.appendChild(this.domElement.get(0));

		this.position();
		this.onresize = function() {
			self.position();
		};
		window.addEventListener("resize", this.onresize);

		this.domElement.find(".x").click(function() {
			self.close();
		});

		if(this.duration > 0) {
			setTimeout(function() {
				self.close();
			}, this.duration);
		}

		return this;
	}

	mixin(Notification.prototype, EventEmitter.prototype);
	Notification.prototype.constructor = Notification;

	Notification.prototype.position = function() {
		var pos = this.target.offset();
		var x = pos.left - (this.domElement.width() / 2) + (this.target.width() / 4);
		var y = pos.top - this.domElement.height() - 8;
		var width = this.domElement.width();
		if(x + width > $("body").width()) {
			x -= ((x + width) - $("body").width());
		}
		if(x < 0) x = 0;
		this.domElement.offset({left: x, top: y});
	};

	Notification.prototype.close = function() {
		var self = this;
		window.removeEventListener("resize",  this.onresize);
		this.domElement.fadeOut(500, function() {
			self.domElement.remove();
			self.emit("close");
		});
	};















// set variables from settings or set settings

////////////////////////////////////////////////////////////////

	var gKeyboardSeq = 0;
	var gKnowsYouCanUseKeyboard = false;
	if(localStorage && localStorage.knowsYouCanUseKeyboard) gKnowsYouCanUseKeyboard = true;
	if(!gKnowsYouCanUseKeyboard) {
		window.gKnowsYouCanUseKeyboardTimeout = setTimeout(function() {
			window.gKnowsYouCanUseKeyboardNotification = new Notification({title: "Did you know!?!",
				text: "You can play the piano with your keyboard, too.  Try it!", target: "#piano", duration: 10000});
		}, 30000);
	}




	if(window.localStorage) {

		if(localStorage.volume) {
			volume_slider.set(localStorage.volume);
			gPiano.audio.setVolume(localStorage.volume);
		}
		else localStorage.volume = gPiano.audio.volume;

		window.gHasBeenHereBefore = (localStorage.gHasBeenHereBefore || false);
		if(gHasBeenHereBefore) {
		}
		localStorage.gHasBeenHereBefore = true;

	}













// New room, change room

////////////////////////////////////////////////////////////////

	$("#room > .info").text("--");
	gClient.on("ch", function(msg) {
		var channel = msg.ch;
		var info = $("#room > .info");
		info.text(channel._id);
		if(channel.settings.lobby) info.addClass("lobby");
		else info.removeClass("lobby");
		if(!channel.settings.chat) info.addClass("no-chat");
		else info.removeClass("no-chat");
		if(channel.settings.crownsolo) info.addClass("crownsolo");
		else info.removeClass("crownsolo");
		if(!channel.settings.visible) info.addClass("not-visible");
		else info.removeClass("not-visible");
	});
	gClient.on("ls", function(ls) {
		for(var i in ls.u) {
			if(!ls.u.hasOwnProperty(i)) continue;
			var room = ls.u[i];
			var info = $("#room .info[roomname=\"" + (room._id + '').replace(/[\\"']/g, '\\$&').replace(/\u0000/g, '\\0') + "\"]");
			if(info.length == 0) {
				info = $("<div class=\"info\"></div>");
				info.attr("roomname", room._id);
				$("#room .more").append(info);
			}
			info.text(room._id + " (" + room.count + ")");
			if(room.settings.lobby) info.addClass("lobby");
			else info.removeClass("lobby");
			if(!room.settings.chat) info.addClass("no-chat");
			else info.removeClass("no-chat");
			if(room.settings.crownsolo) info.addClass("crownsolo");
			else info.removeClass("crownsolo");
			if(!room.settings.visible) info.addClass("not-visible");
			else info.removeClass("not-visible");
		}
	});
	$("#room").on("click", function(evt) {
		evt.stopPropagation();

		// clicks on a new room
		if($(evt.target).hasClass("info") && $(evt.target).parents(".more").length) {
			$("#room .more").fadeOut(250);
			var selected_name = $(evt.target).attr("roomname");
			if(typeof selected_name != "undefined") {
				changeRoom(selected_name, "right");
			}
			return false;
		}
		// clicks on "New Room..."
		else if($(evt.target).hasClass("new")) {
			openModal("#new-room", "input[name=name]");
		}
		// all other clicks
		var doc_click = function(evt) {
			if($(evt.target).is("#room .more")) return;
			$(document).off("mousedown", doc_click);
			$("#room .more").fadeOut(250);
			gClient.sendArray([{m: "-ls"}]);
		}
		$(document).on("mousedown", doc_click);
		$("#room .more .info").remove();
		$("#room .more").show();
		gClient.sendArray([{m: "+ls"}]);
	});
	$("#new-room-btn").on("click", function(evt) {
		evt.stopPropagation();
		openModal("#new-room", "input[name=name]");
	});


	$("#play-alone-btn").on("click", function(evt) {
		evt.stopPropagation();
		var room_name = "Room" + Math.floor(Math.random() * 1000000000000);
		changeRoom(room_name, "right", {"visible": false, "chat": true, "crownsolo": false});
		setTimeout(function() {
			new Notification({id: "share", title: "Playing alone", html: 'You are playing alone in a room by yourself, but you can always invite \
				friends by sending them the link.<br/><br/>\
				<a href="#" onclick="window.open(\'https://www.facebook.com/sharer/sharer.php?u=\'+encodeURIComponent(location.href),\'facebook-share-dialog\',\'width=626,height=436\');return false;">Share on Facebook</a><br/><br/>\
				<a href="http://twitter.com/home?status='+encodeURIComponent(location.href)+'" target="_blank">Tweet</a>', duration: 25000});
		}, 1000);
	});



	var gModal;

	function modalHandleEsc(evt) {
		if(evt.keyCode == 27) {
			closeModal();
			evt.preventDefault();
			evt.stopPropagation();
		}
	};

	function openModal(selector, focus) {
		chat.blur();
		releaseKeyboard();
		$(document).on("keydown", modalHandleEsc);
		$("#modal #modals > *").hide();
		$("#modal").fadeIn(250);
		$(selector).show();
		setTimeout(function() {
			$(selector).find(focus).focus();
		}, 100);
		gModal = selector;
	};

	function closeModal() {
		$(document).off("keydown", modalHandleEsc);
		$("#modal").fadeOut(100);
		$("#modal #modals > *").hide();
		captureKeyboard();
		gModal = null;
	};

	var modal_bg = $("#modal .bg")[0];
	$(modal_bg).on("click", function(evt) {
		if(evt.target != modal_bg) return;
		closeModal();
	});

	(function() {
		function submit() {
			var name = $("#new-room .text[name=name]").val();
			var settings = {
				visible: $("#new-room .checkbox[name=visible]").is(":checked"),
				chat: true,
				crownsolo: false
			};
			$("#new-room .text[name=name]").val("");
			closeModal();
			changeRoom(name, "right", settings);
			setTimeout(function() {
			new Notification({id: "share", title: "Created a Room", html: 'You can invite friends to your room by sending them the link.<br/><br/>\
				<a href="#" onclick="window.open(\'https://www.facebook.com/sharer/sharer.php?u=\'+encodeURIComponent(location.href),\'facebook-share-dialog\',\'width=626,height=436\');return false;">Share on Facebook</a><br/><br/>\
				<a href="http://twitter.com/home?status='+encodeURIComponent(location.href)+'" target="_blank">Tweet</a>', duration: 25000});
		}, 1000);
		};
		$("#new-room .submit").click(function(evt) {
			submit();
		});
		$("#new-room .text[name=name]").keypress(function(evt) {
			if(evt.keyCode == 13) {
				submit();
			} else if(evt.keyCode == 27) {
				closeModal();
			} else {
				return;
			}
			evt.preventDefault();
			evt.stopPropagation();
			return false;
		});
	})();








	function changeRoom(name, direction, settings, push) {
		if(!settings) settings = {};
		if(!direction) direction = "right";
		if(typeof push == "undefined") push = true;
		var opposite = direction == "left" ? "right" : "left";

		if(name == "") name = "lobby";
		if(gClient.channel && gClient.channel._id === name) return;
		if(push) {
			var url = "/" + encodeURIComponent(name).replace("'", "%27");
			if(window.history && history.pushState) {
				history.pushState({"depth": gHistoryDepth += 1, "name": name}, "Piano > " + name, url);
			} else {
				window.location = url;
				return;
			}
		}

		gClient.setChannel(name, settings);

		var t = 0, d = 100;
		$("#piano").addClass("ease-out").addClass("slide-" + opposite);
		setTimeout(function() {
			$("#piano").removeClass("ease-out").removeClass("slide-" + opposite).addClass("slide-" + direction);
		}, t += d);
		setTimeout(function() {
			$("#piano").addClass("ease-in").removeClass("slide-" + direction);
		}, t += d);
		setTimeout(function() {
			$("#piano").removeClass("ease-in");
		}, t += d);
	};

	var gHistoryDepth = 0;
	$(window).on("popstate", function(evt) {
		var depth = evt.state ? evt.state.depth : 0;
		if(depth == gHistoryDepth) return; // <-- forgot why I did that though...

		var direction = depth <= gHistoryDepth ? "left" : "right";
		gHistoryDepth = depth;

		var name = decodeURIComponent(window.location.pathname);
		if(name.substr(0, 1) == "/") name = name.substr(1);
		changeRoom(name, direction, null, false);
	});




















// Rename

////////////////////////////////////////////////////////////////

(function() {
		function submit() {
			var set = {
				name: $("#rename input[name=name]").val(),
				color: $("#rename input[name=color]").val()
			};
			//$("#rename .text[name=name]").val("");
			closeModal();
			gClient.sendArray([{m: "userset", set: set}]);
		};
		$("#rename .submit").click(function(evt) {
			submit();
		});
		$("#rename .text[name=name]").keypress(function(evt) {
			if(evt.keyCode == 13) {
				submit();
			} else if(evt.keyCode == 27) {
				closeModal();
			} else {
				return;
			}
			evt.preventDefault();
			evt.stopPropagation();
			return false;
		});
	})();















// chatctor

////////////////////////////////////////////////////////////////

	var chat = (function() {
		gClient.on("ch", function(msg) {
			if(msg.ch.settings.chat) {
				chat.show();
			} else {
				chat.hide();
			}
		});
		gClient.on("disconnect", function(msg) {
			chat.hide();
		});
		gClient.on("c", function(msg) {
			chat.clear();
			if(msg.c) {
				for(var i = 0; i < msg.c.length; i++) {
					chat.receive(msg.c[i]);
				}
			}
		});
		gClient.on("a", function(msg) {
			chat.receive(msg);
		});

		$("#chat input").on("focus", function(evt) {
			releaseKeyboard();
			$("#chat").addClass("chatting");
			chat.scrollToBottom();
		});
		/*$("#chat input").on("blur", function(evt) {
			captureKeyboard();
			$("#chat").removeClass("chatting");
			chat.scrollToBottom();
		});*/
		$(document).mousedown(function(evt) {
			if(!$("#chat").has(evt.target).length > 0) {
				chat.blur();
			}
		});
		document.addEventListener("touchstart", function(event) {
			for(var i in event.changedTouches) {
				var touch = event.changedTouches[i];
				if(!$("#chat").has(touch.target).length > 0) {
					chat.blur();
				}
			}
		});
		$(document).on("keydown", function(evt) {
			if($("#chat").hasClass("chatting")) {
				if(evt.keyCode == 27) {
					chat.blur();
					evt.preventDefault();
					evt.stopPropagation();
				} else if(evt.keyCode == 13) {
					$("#chat input").focus();
				}
			} else if(!gModal && (evt.keyCode == 27 || evt.keyCode == 13)) {
				$("#chat input").focus();
			}
		});
		$("#chat input").on("keydown", function(evt) {
			if(evt.keyCode == 13) {
				var message = $(this).val();
				if(message.length == 0) {
					setTimeout(function() {
						chat.blur();
					}, 100);
				} else if(message.length <= 512) {
					chat.send(message);
					$(this).val("");
					setTimeout(function() {
						chat.blur();
					}, 100);
				}
				evt.preventDefault();
				evt.stopPropagation();
			} else if(evt.keyCode == 27) {
				chat.blur();
				evt.preventDefault();
				evt.stopPropagation();
			} else if(evt.keyCode == 9) {
				evt.preventDefault();
				evt.stopPropagation();
			}
		});

		return {
			show: function() {
				$("#chat").fadeIn();
			},

			hide: function() {
				$("#chat").fadeOut();
			},

			clear: function() {
				$("#chat li").remove();
			},

			scrollToBottom: function() {
				var ele = $("#chat ul").get(0);
				ele.scrollTop = ele.scrollHeight;
			},

			blur: function() {
				if($("#chat").hasClass("chatting")) {
					$("#chat input").get(0).blur();
					$("#chat").removeClass("chatting");
					chat.scrollToBottom();
					captureKeyboard();
				}
			},

			send: function(message) {
				gClient.sendArray([{m:"a", message: message}]);
			},

			receive: function(msg) {
				if(gChatMutes.indexOf(msg.p._id) != -1) return;

				var li = $('<li><span class="name"/><span class="message"/>');

				li.find(".name").text(msg.p.name + ":");
				li.find(".message").text(msg.a);
				li.css("color", msg.p.color || "white");

				$("#chat ul").append(li);

				var eles = $("#chat ul li").get();
				for(var i = 1; i <= 50 && i <= eles.length; i++) {
					eles[eles.length - i].style.opacity = 1.0 - (i * 0.03);
				}
				if(eles.length > 50) {
					eles[0].style.display = "none";
				}
				if(eles.length > 256) {
					$(eles[0]).remove();
				}

				// scroll to bottom if not "chatting" or if not scrolled up
				if(!$("#chat").hasClass("chatting")) {
					chat.scrollToBottom();
				} else {
					var ele = $("#chat ul").get(0);
					if(ele.scrollTop > ele.scrollHeight - ele.offsetHeight - 50)
						chat.scrollToBottom();
				}
			}
		};
	})();















// MIDI

////////////////////////////////////////////////////////////////

	var MIDI_TRANSPOSE = -12;
	var MIDI_KEY_NAMES = ["a-1", "as-1", "b-1"];
	var bare_notes = "c cs d ds e f fs g gs a as b".split(" ");
	for(var oct = 0; oct < 7; oct++) {
		for(var i in bare_notes) {
			MIDI_KEY_NAMES.push(bare_notes[i] + oct);
		}
	}
	MIDI_KEY_NAMES.push("c7");

	(function() {

		if (navigator.requestMIDIAccess) {
			navigator.requestMIDIAccess().then(
				function(midi) {
					console.log(midi);
					function midimessagehandler(evt) {
						if(!evt.target.enabled) return;
						//console.log(evt);
						var channel = evt.data[0] & 0xf;
						var cmd = evt.data[0] >> 4;
						var note_number = evt.data[1];
						var vel = evt.data[2];
						//console.log(channel, cmd, note_number, vel);
						if(cmd == 8 || (cmd == 9 && vel == 0)) {
							// NOTE_OFF
							release(MIDI_KEY_NAMES[note_number - 9 + MIDI_TRANSPOSE]);
						} else if(cmd == 9) {
							// NOTE_ON
							press(MIDI_KEY_NAMES[note_number - 9 + MIDI_TRANSPOSE], vel / 100);
						} else if(cmd == 11) {
							// CONTROL_CHANGE
							if(!gAutoSustain) {
								if(note_number == 64) {
									if(vel > 0) {
										pressSustain();
									} else {
										releaseSustain();
									}
								}
							}
						}
					}

					function plug() {
						if(midi.inputs.size > 0) {
							var inputs = midi.inputs.values();
							for(var input_it = inputs.next(); input_it && !input_it.done; input_it = inputs.next()) {
								var input = input_it.value;
								//input.removeEventListener("midimessage", midimessagehandler);
								//input.addEventListener("midimessage", midimessagehandler);
								input.onmidimessage = midimessagehandler;
								if(input.enabled !== false) {
									input.enabled = true;
								}
								console.log("input", input);
							}
						}
						if(midi.outputs.size > 0) {
							var outputs = midi.outputs.values();
							for(var output_it = outputs.next(); output_it && !output_it.done; output_it = outputs.next()) {
								var output = output_it.value;
								//output.enabled = false; // edit: don't touch
								console.log("output", output);
							}
							gMidiOutTest = function(note_name, vel, delay_ms) {
								var note_number = MIDI_KEY_NAMES.indexOf(note_name);
								if(note_number == -1) return;
								note_number = note_number + 9 - MIDI_TRANSPOSE;

								var outputs = midi.outputs.values();
								for(var output_it = outputs.next(); output_it && !output_it.done; output_it = outputs.next()) {
									var output = output_it.value;
									if(output.enabled) {
										output.send([0x90, note_number, vel], window.performance.now() + delay_ms);
									}
								}
							}
						}
						showConnections(false);
					}

					midi.addEventListener("statechange", function(evt) {
						if(evt instanceof MIDIConnectionEvent) {
							plug();
						}
					});

					plug();


					var connectionsNotification;

					function showConnections(sticky) {
						//if(document.getElementById("Notification-MIDI-Connections"))
							//sticky = 1; // todo: instead,
						var inputs_ul = document.createElement("ul");
						if(midi.inputs.size > 0) {
							var inputs = midi.inputs.values();
							for(var input_it = inputs.next(); input_it && !input_it.done; input_it = inputs.next()) {
								var input = input_it.value;
								var li = document.createElement("li");
								li.connectionId = input.id;
								li.classList.add("connection");
								if(input.enabled) li.classList.add("enabled");
								li.textContent = input.name;
								li.addEventListener("click", function(evt) {
									var inputs = midi.inputs.values();
									for(var input_it = inputs.next(); input_it && !input_it.done; input_it = inputs.next()) {
										var input = input_it.value;
										if(input.id === evt.target.connectionId) {
											input.enabled = !input.enabled;
											evt.target.classList.toggle("enabled");
											console.log("click", input);
											return;
										}
									}
								});
								inputs_ul.appendChild(li);
							}
						} else {
							inputs_ul.textContent = "(none)";
						}
						var outputs_ul = document.createElement("ul");
						if(midi.outputs.size > 0) {
							var outputs = midi.outputs.values();
							for(var output_it = outputs.next(); output_it && !output_it.done; output_it = outputs.next()) {
								var output = output_it.value;
								var li = document.createElement("li");
								li.connectionId = output.id;
								li.classList.add("connection");
								if(output.enabled) li.classList.add("enabled");
								li.textContent = output.name;
								li.addEventListener("click", function(evt) {
									var outputs = midi.outputs.values();
									for(var output_it = outputs.next(); output_it && !output_it.done; output_it = outputs.next()) {
										var output = output_it.value;
										if(output.id === evt.target.connectionId) {
											output.enabled = !output.enabled;
											evt.target.classList.toggle("enabled");
											console.log("click", output);
											return;
										}
									}
								});
								outputs_ul.appendChild(li);
							}
						} else {
							outputs_ul.textContent = "(none)";
						}
						var div = document.createElement("div");
						var h1 = document.createElement("h1");
						h1.textContent = "Inputs";
						div.appendChild(h1);
						div.appendChild(inputs_ul);
						h1 = document.createElement("h1");
						h1.textContent = "Outputs";
						div.appendChild(h1);
						div.appendChild(outputs_ul);
						connectionsNotification = new Notification({"id":"MIDI-Connections", "title":"MIDI Connections","duration":sticky?"-1":"4500","html":div,"target":"#midi-btn"});
					}

					document.getElementById("midi-btn").addEventListener("click", function(evt) {
						if(!document.getElementById("Notification-MIDI-Connections"))
							showConnections(true);
						else {
							connectionsNotification.close();
						}
					});
				},
				function(err){
					console.log(err);
				} );
		}
	})();














// bug supply

////////////////////////////////////////////////////////////////

	window.onerror = function(message, url, line) {
		var url = url || "(no url)";
		var line = line || "(no line)";
		// errors in socket.io
		if(url.indexOf("socket.io.js") !== -1) {
			if(message.indexOf("INVALID_STATE_ERR") !== -1) return;
			if(message.indexOf("InvalidStateError") !== -1) return;
			if(message.indexOf("DOM Exception 11") !== -1) return;
			if(message.indexOf("Property 'open' of object #<c> is not a function") !== -1) return;
			if(message.indexOf("Cannot call method 'close' of undefined") !== -1) return;
			if(message.indexOf("Cannot call method 'close' of null") !== -1) return;
			if(message.indexOf("Cannot call method 'onClose' of null") !== -1) return;
			if(message.indexOf("Cannot call method 'payload' of null") !== -1) return;
			if(message.indexOf("Unable to get value of the property 'close'") !== -1) return;
			if(message.indexOf("NS_ERROR_NOT_CONNECTED") !== -1) return;
			if(message.indexOf("Unable to get property 'close' of undefined or null reference") !== -1) return;
			if(message.indexOf("Unable to get value of the property 'close': object is null or undefined") !== -1) return;
			if(message.indexOf("this.transport is null") !== -1) return;
		}
		// errors in soundmanager2
		if(url.indexOf("soundmanager2.js") !== -1) {
			// operation disabled in safe mode?
			if(message.indexOf("Could not complete the operation due to error c00d36ef") !== -1) return;
			if(message.indexOf("_s.o._setVolume is not a function") !== -1) return;
		}
		// errors in midibridge
		if(url.indexOf("midibridge") !== -1) {
			if(message.indexOf("Error calling method on NPObject") !== -1) return;
		}
		// too many failing extensions injected in my html
		if(url.indexOf(".js") !== url.length - 3) return;
		// extensions inject cross-domain embeds too
		if(url.toLowerCase().indexOf("multiplayerpiano.com") == -1) return;

		// errors in my code
		if(url.indexOf("script.js") !== -1) {
			if(message.indexOf("Object [object Object] has no method 'on'") !== -1) return;
			if(message.indexOf("Object [object Object] has no method 'off'") !== -1) return;
			if(message.indexOf("Property '$' of object [object Object] is not a function") !== -1) return;
		}

		var enc = "/bugreport/"
			+ (message ? encodeURIComponent(message) : "") + "/"
			+ (url ? encodeURIComponent(url) : "") + "/"
			+ (line ? encodeURIComponent(line) : "");
		var img = new Image();
		img.src = enc;
	};









	// API
	window.MPP = {
		press: press,
		release: release,
		piano: gPiano,
		client: gClient,
		chat: chat
	};










	// record mp3
	(function() {
		var button = document.querySelector("#record-btn");
		var audio = MPP.piano.audio;
		var context = audio.context;
		var encoder_sample_rate = 44100;
		var encoder_kbps = 128;
		var encoder = null;
		var scriptProcessorNode = context.createScriptProcessor(4096, 2, 2);
		var recording = false;
		var recording_start_time = 0;
		var mp3_buffer = [];
		button.addEventListener("click", function(evt) {
			if(!recording) {
				// start recording
				mp3_buffer = [];
				encoder = new lamejs.Mp3Encoder(2, encoder_sample_rate, encoder_kbps);
				scriptProcessorNode.onaudioprocess = onAudioProcess;
				audio.masterGain.connect(scriptProcessorNode);
				scriptProcessorNode.connect(context.destination);
				recording_start_time = Date.now();
				recording = true;
				button.textContent = "Stop Recording";
				button.classList.add("stuck");
				new Notification({"id": "mp3", "title": "Recording MP3...", "html": "It's recording now.  This could make things slow, maybe.  Maybe give it a moment to settle before playing.<br><br>This feature is experimental.<br>Send complaints to <a href=\"mailto:multiplayerpiano.com@gmail.com\">multiplayerpiano.com@gmail.com</a>.", "duration": 10000});
			} else {
				// stop recording
				var mp3buf = encoder.flush();
				mp3_buffer.push(mp3buf);
				var blob = new Blob(mp3_buffer, {type: "audio/mp3"});
				var url = URL.createObjectURL(blob);
				scriptProcessorNode.onaudioprocess = null;
				audio.masterGain.disconnect(scriptProcessorNode);
				scriptProcessorNode.disconnect(context.destination);
				recording = false;
				button.textContent = "Record MP3";
				button.classList.remove("stuck");
				new Notification({"id": "mp3", "title": "MP3 recording finished", "html": "<a href=\""+url+"\" target=\"blank\">And here it is!</a> (open or save as)<br><br>This feature is experimental.<br>Send complaints to <a href=\"mailto:multiplayerpiano.com@gmail.com\">multiplayerpiano.com@gmail.com</a>.", "duration": 0});
			}
		});
		function onAudioProcess(evt) {
			var inputL = evt.inputBuffer.getChannelData(0);
			var inputR = evt.inputBuffer.getChannelData(1);
			var mp3buf = encoder.encodeBuffer(convert16(inputL), convert16(inputR));
			mp3_buffer.push(mp3buf);
		}
		function convert16(samples) {
			var len = samples.length;
			var result = new Int16Array(len);
			for(var i = 0; i < len; i++) {
				result[i] = 0x8000 * samples[i];
			}
			return(result);
		}
	})();







	// synth
	var enableSynth = false;
	var audio = gPiano.audio;
	var context = gPiano.audio.context;
	var synth_gain = context.createGain();
	synth_gain.gain.value = 0.05;
	synth_gain.connect(audio.synthGain);

	var osc_types = ["sine", "square", "sawtooth", "triangle"];
	var osc_type_index = 1;

	var osc1_type = "square";
	var osc1_attack = 0;
	var osc1_decay = 0.2;
	var osc1_sustain = 0.5;
	var osc1_release = 2.0;

	function synthVoice(note_name, time) {
		var note_number = MIDI_KEY_NAMES.indexOf(note_name);
		note_number = note_number + 9 - MIDI_TRANSPOSE;
		var freq = Math.pow(2, (note_number - 69) / 12) * 440.0;
		this.osc = context.createOscillator();
		this.osc.type = osc1_type;
		this.osc.frequency.value = freq;
		this.gain = context.createGain();
		this.gain.gain.value = 0;
		this.osc.connect(this.gain);
		this.gain.connect(synth_gain);
		this.osc.start(time);
		this.gain.gain.setValueAtTime(0, time);
		this.gain.gain.linearRampToValueAtTime(1, time + osc1_attack);
		this.gain.gain.linearRampToValueAtTime(osc1_sustain, time + osc1_attack + osc1_decay);
	}

	synthVoice.prototype.stop = function(time) {
		//this.gain.gain.setValueAtTime(osc1_sustain, time);
		this.gain.gain.linearRampToValueAtTime(0, time + osc1_release);
		this.osc.stop(time + osc1_release);
	};

	(function() {
		var button = document.getElementById("synth-btn");
		var notification;

		button.addEventListener("click", function() {
			if(notification) {
				notification.close();
			} else {
				showSynth();
			}
		});

		function showSynth() {

			var html = document.createElement("div");

			// on/off button
			(function() {
				var button = document.createElement("input");
				mixin(button, {type: "button", value: "ON/OFF", className: enableSynth ? "switched-on" : "switched-off"});
				button.addEventListener("click", function(evt) {
					enableSynth = !enableSynth;
					button.className = enableSynth ? "switched-on" : "switched-off";
					if(!enableSynth) {
						// stop all
						for(var i in audio.playings) {
							if(!audio.playings.hasOwnProperty(i)) continue;
							var playing = audio.playings[i];
							if(playing && playing.voice) {
								playing.voice.osc.stop();
								playing.voice = undefined;
							}
						}
					}
				});
				html.appendChild(button);
			})();

			// mix
			var knob = document.createElement("canvas");
			mixin(knob, {width: 32, height: 32, className: "knob"});
			html.appendChild(knob);
			knob = new Knob(knob, 0, 100, 0.1, 50, "mix", "%");
			knob.on("change", function(k) {
				var mix = k.value / 100;
				audio.pianoGain.gain.value = 1 - mix;
				audio.synthGain.gain.value = mix;
			});
			knob.emit("change", knob);

			// osc1 type
			(function() {
				osc1_type = osc_types[osc_type_index];
				var button = document.createElement("input");
				mixin(button, {type: "button", value: osc_types[osc_type_index]});
				button.addEventListener("click", function(evt) {
					if(++osc_type_index >= osc_types.length) osc_type_index = 0;
					osc1_type = osc_types[osc_type_index];
					button.value = osc1_type;
				});
				html.appendChild(button);
			})();

			// osc1 attack
			var knob = document.createElement("canvas");
			mixin(knob, {width: 32, height: 32, className: "knob"});
			html.appendChild(knob);
			knob = new Knob(knob, 0, 1, 0.001, osc1_attack, "osc1 attack", "s");
			knob.on("change", function(k) {
				osc1_attack = k.value;
			});
			knob.emit("change", knob);

			// osc1 decay
			var knob = document.createElement("canvas");
			mixin(knob, {width: 32, height: 32, className: "knob"});
			html.appendChild(knob);
			knob = new Knob(knob, 0, 2, 0.001, osc1_decay, "osc1 decay", "s");
			knob.on("change", function(k) {
				osc1_decay = k.value;
			});
			knob.emit("change", knob);

			var knob = document.createElement("canvas");
			mixin(knob, {width: 32, height: 32, className: "knob"});
			html.appendChild(knob);
			knob = new Knob(knob, 0, 1, 0.001, osc1_sustain, "osc1 sustain", "x");
			knob.on("change", function(k) {
				osc1_sustain = k.value;
			});
			knob.emit("change", knob);

			// osc1 release
			var knob = document.createElement("canvas");
			mixin(knob, {width: 32, height: 32, className: "knob"});
			html.appendChild(knob);
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});



















// misc

////////////////////////////////////////////////////////////////

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