youtube audio enhancement

//copy and paste this into the Javascript Developer console in devtools on a youtube video webpage, then hit enter, click play on the video if it's not already playing

v1=document.getElementsByTagName("video")[0];

self.au=new AudioContext();

self.gn1=au.createGain();
self.gn2=au.createGain();
self.gn3=au.createGain();

gn1.gain.value=0.5;
gn2.gain.value=0.3;
gn3.gain.value=0.2;

self.dy1=au.createDelay();
self.dy2=au.createDelay();
self.dy3=au.createDelay();

dy1.delayTime.value=0.4;
dy2.delayTime.value=0.7;
dy3.delayTime.value=0.9;

gn1.connect(dy1);
gn2.connect(dy2);
gn3.connect(dy3);

self.mes=au.createMediaElementSource(v1);
mes.connect(gn1);
mes.connect(gn2);
mes.connect(gn3);

mes.connect(au.destination);

dy1.connect(au.destination);
dy2.connect(au.destination);
dy3.connect(au.destination);