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rowild/Web Audio API - Sound Fading

Forked from ichabodcole/Web Audio API - Sound Fading
Created October 27, 2015 15:26
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Reference for fading in and out sounds with the Web Audio API
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Web Audio API - Sound Fading
fadeTo: (value, fadeLength)->
fadeLength = fadeLength || @defaultfadeLength
currentTime = @ctx.currentTime
#time the fade should complete
fadeTime = currentTime + fadeLength
#set the start time
@masterGain.gain.setValueAtTime(@userVolume, currentTime)
@masterGain.gain.linearRampToValueAtTime(value, fadeTime)
fadeOut: (fadeLength)->
fadeLength = fadeLength || @defaultfadeLength
@fadeTo(0, fadeLength)
fadeIn: (fadeLength)->
fadeLength = fadeLength || @defaultfadeLength
@fadeTo(@userVolume, fadeLength)
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