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add @Miranet's fix for issue #11

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https://github.com/mudcube/MIDI.js/issues/11
This commit is contained in:
Michael Deal 2013-01-25 09:33:47 -08:00
parent 485a2be277
commit c97c636cd1
1 changed files with 9 additions and 5 deletions
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14
js/MIDI/Plugin.js
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@ -4,7 +4,10 @@
-------------------------------------------- --------------------------------------------
https://github.com/mudcube/MIDI.js https://github.com/mudcube/MIDI.js
-------------------------------------------- --------------------------------------------
APIs: Inspired by javax.sound.midi (albeit a super simple version):
http://docs.oracle.com/javase/6/docs/api/javax/sound/midi/package-summary.html
--------------------------------------------
Technologies:
MIDI.WebMIDIAPI MIDI.WebMIDIAPI
MIDI.WebAudioAPI MIDI.WebAudioAPI
MIDI.Flash MIDI.Flash
@ -175,15 +178,16 @@ if (window.AudioContext || window.webkitAudioContext) (function () {
return source; return source;
}; };
// FIX: needs some way to fade out smoothly..
// POSSIBLE FIX: fade out smoothly using gain and ramping to value
root.noteOff = function (channel, note, delay) { root.noteOff = function (channel, note, delay) {
delay = delay || 0; delay = delay || 0;
if (delay < ctx.currentTime) delay += ctx.currentTime;
var source = sources[channel + "" + note]; var source = sources[channel + "" + note];
if (!source) return; if (!source) return;
// @Miranet: "the values of 0.4 and 0.5 could ofcourse be used as
// a 'release' parameter for ADSR like time settings."
source.gain.linearRampToValueAtTime(1, delay); source.gain.linearRampToValueAtTime(1, delay);
source.gain.linearRampToValueAtTime(0, delay + 0.75); source.gain.linearRampToValueAtTime(0, delay + 0.4);
source.noteOff(delay + 0.75); source.noteOff(delay + 0.5);
return source; return source;
}; };