deac/MIDI.js
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tweaks to node fade out

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Michael Deal 2012-11-20 23:11:18 -08:00
parent 378e881282
commit ccb647f2a1
1 changed files with 8 additions and 10 deletions
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18
js/MIDI/Plugin.js
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@ -1,6 +1,6 @@
/*
MIDI.Plugin : 0.3
-------------------------------------
MIDI.Plugin : 0.3 : 11/20/2012
-------------------------------------
https://github.com/mudx/MIDI.js
-------------------------------------
@ -11,7 +11,7 @@
MIDI.channels
MIDI.keyToNote
MIDI.noteToKey
-------------------------------------
setMute?
getInstruments?
@ -79,16 +79,13 @@ if (window.AudioContext || window.webkitAudioContext) (function () {
sources[channel + "" + note] = source;
source.buffer = audioBuffers[note];
source.connect(ctx.destination);
//
///
var gainNode = ctx.createGainNode();
var value = -0.5 + (velocity / 100) * 2;
var minus = (1 - masterVolume) * 2;
gainNode.connect(ctx.destination);
gainNode.gain.value = Math.max(-1, value - minus);
source.connect(gainNode);
//
// source.playbackRate.value = 2;
///
source.noteOn(delay || 0);
return source;
};
@ -102,13 +99,14 @@ if (window.AudioContext || window.webkitAudioContext) (function () {
};
// FIX: needs some way to fade out smoothly..
// POSSIBLE FIX: fade out smoothly using gain and ramping to value
// POSSIBLE FIX: fade out smoothly using gain and ramping to value
root.noteOff = function (channel, note, delay) {
delay = delay || 0;
var source = sources[channel+""+note];
if (!source) return;
source.gain.linearRampToValueAtTime(1, delay);
source.gain.linearRampToValueAtTime(0, delay + 0.1);
source.noteOff(delay || 0);
source.gain.linearRampToValueAtTime(0, delay + 0.75);
source.noteOff(delay + 0.75);
return source;
};