<!DOCTYPE html>
<html>
<body>
<script>
var context;
var oscillator;
function startPlaying()
{
    if (context)
        context.close();

    context = new AudioContext();
    oscillator = new OscillatorNode(context);
    oscillator.connect(context.destination);
    oscillator.start();
}

function generateAudioInMediaStreamTrack()
{
    if (context)
        context.close();

    context = new AudioContext();
    oscillator = new OscillatorNode(context);

    const mediaStreamDestination = context.createMediaStreamDestination();
    oscillator.connect(mediaStreamDestination);
    oscillator.start();
}

function transitionAudioToSpeakers()
{
    if (context)
        oscillator.connect(context.destination);
}

</script>
</body>
</html>