Slide 32
Slide 32 text
var
ctx
=
new
AudioContext();
var
osc
=
ctx.createOscillator();
var
gain
=
ctx.createGain();
var
levels
=
[1.0,
0.9,
0.8,
0.7,
0.6,
0.5,
0.4,
0.3,
0.2,
0.1];
var
levelIdx
=
0;
var
timerId
=
setInterval(function
()
{
if
(levelIdx
>=
levels.length)
{
clearInterval(timerId);
return;
}
console.log(levels[levelIdx]);
gain.gain.value
=
levels[levelIdx];
//
set
gain
if
(levelIdx
===
0)
{
osc.start(0);
osc.stop(ctx.currentTime
+
levels.length
*
0.5);
}
levelIdx++;
},
500);
osc.connect(gain);
gain.connect(ctx.destination);
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