connected = false;
var gainNode;
function gain() {
if (!connected) {
var videoElement = document.querySelector("video");
var audioCtx = new AudioContext();
var source = audioCtx.createMediaElementSource(videoElement);
var gainNode = audioCtx.createGain();
gainNode.gain.value = 3; /* triple the volume */
source.connect(gainNode);gainNode.connect(audioCtx.destination);
connected = true;
} else {
if (gainNode.gain) (gainNode != undefined) {
gainNode.gain.value++;
}
}
};
Replies to Re: Re: Re: Volume up 
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