<script type="text/javascript">

			var webaudio_tooling_obj = function () {

				var audioContext = new AudioContext();

				console.log("audio is starting up ...");

				var BUFF_SIZE = 16384;

				var audioInput = null,
					microphone_stream = null,
					gain_node = null,
					script_processor_node = null,
					script_processor_fft_node = null,
					analyserNode = null;

				if (!navigator.getUserMedia)
					navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia ||
						navigator.mozGetUserMedia || navigator.msGetUserMedia;

				if (navigator.getUserMedia){

					navigator.getUserMedia({audio:true},
						function(stream) {
							start_microphone(stream);
						},
						function(e) {
							alert('Error capturing audio.');
						}
					);

				} else { alert('getUserMedia not supported in this browser.\nTry using Chrome or Firefox.'); }

				// ---

				function show_some_data(given_typed_array, num_row_to_display, label) {

					var size_buffer = given_typed_array.length;
					var index = 0;
					var max_index = num_row_to_display;

					console.log("__________ " + label);

					for (; index < max_index && index < size_buffer; index += 1) {

						console.log(given_typed_array[index]);
					}
				}

				function process_microphone_buffer(event) {

					var i, N, inp, microphone_output_buffer;

					microphone_output_buffer = event.inputBuffer.getChannelData(0); // just mono - 1 channel for now
					console.log(microphone_output_buffer);
					// microphone_output_buffer  <-- this buffer contains current gulp of data size BUFF_SIZE

					//Probably send it to backend here


					//show_some_data(microphone_output_buffer, 5, "from getChannelData");
				}

				function start_microphone(stream){

					//gain_node = audioContext.createGain();
					//gain_node.connect( audioContext.destination );

					microphone_stream = audioContext.createMediaStreamSource(stream);
					//microphone_stream.connect(gain_node);

					script_processor_node = audioContext.createScriptProcessor(BUFF_SIZE, 1, 1);
					script_processor_node.onaudioprocess = process_microphone_buffer;

					microphone_stream.connect(script_processor_node);

					// --- enable volume control for output speakers

					document.getElementById('volume').addEventListener('change', function() {

						var curr_volume = 1;//this.value;
						//gain_node.gain.value = curr_volume;

						console.log("curr_volume ", curr_volume);
					});

					// --- setup FFT

					script_processor_fft_node = audioContext.createScriptProcessor(2048, 1, 1);
					script_processor_fft_node.connect(gain_node);

					analyserNode = audioContext.createAnalyser();
					analyserNode.smoothingTimeConstant = 0;
					analyserNode.fftSize = 2048;

					microphone_stream.connect(analyserNode);

					analyserNode.connect(script_processor_fft_node);

					script_processor_fft_node.onaudioprocess = function() {

						// get the average for the first channel
						var array = new Uint8Array(analyserNode.frequencyBinCount);
						analyserNode.getByteFrequencyData(array);

						// draw the spectrogram
						if (microphone_stream.playbackState == microphone_stream.PLAYING_STATE) {

							//show_some_data(array, 5, "from fft");
						}
					};
				}

			}(); //  webaudio_tooling_obj = function()

		</script>