WebAudio API multi-voice experimentation

[Charlie Veniot]

Put the following in a new tiddler:

```

<iframe srcdoc="
<script>
                context = new AudioContext();

                var merger = context.createChannelMerger(3);
                merger.connect(context.destination);

                oscillatorNode1 = context.createOscillator();
                oscillatorNode1.type = 'sine';
                oscillatorNode1.frequency.value = 220;

                oscillatorNode2 = context.createOscillator();
                oscillatorNode2.type = 'sine';
                oscillatorNode2.frequency.value = 293.6648;

                oscillatorNode3 = context.createOscillator();
                oscillatorNode3.type = 'triangle';
                oscillatorNode3.frequency.value = 783.9909;

                oscillatorNode1.connect(merger, 0, 0);
                oscillatorNode1.start();

                oscillatorNode2.connect(merger, 0, 1);
                oscillatorNode2.start();

                oscillatorNode3.connect(merger, 0, 2);
                oscillatorNode3.start();
</script>">
</iframe>

```

[Charlie Veniot]

Here's something interesting.

Although the first and second oscillators are playing, the third oscillator is not.

I tested by, one at a time,  changing one oscillator's frequency to 1000.  That note plays only for the first two oscillators, but not the third.

So I tried this for the giggles:

```

var merger = context.createChannelMerger(4)

```

After that change, the three oscillators play A-1.

Change it to 5, and the third oscillator does not play.  Change it to 6, and the notes play, but the sound is horrible.

I do not know if this behaviour applies to only the Chrome browser or to many browsers.