library-mirrors/sfxr.lua
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Added mutating

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nucular 2014-05-07 19:11:43 +02:00
parent 8127c6a9fa
commit 299e2d14f1
1 changed files with 39 additions and 0 deletions
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sfxr.lua
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@ -452,6 +452,45 @@ function sfxr.Sound:randomize(seed)
self.change.amount = random(-1, 1)
end
function sfxr.Sound:mutate(amount, changeFreq)
local amount = (amount or 1)
local a = amount / 20
local b = (1 - a) * 10
local changeFreq = changeFreq or true
if changeFreq == true then
if maybe(b) then self.frequency.start = self.frequency.start + random(-a, a) end
if maybe(b) then self.frequency.slide = self.frequency.slide + random(-a, a) end
if maybe(b) then self.frequency.deltaSlide = self.frequency.deltaSlide + random(-a, a) end
end
if maybe(b) then self.duty.ratio = self.duty.ratio + random(-a, a) end
if maybe(b) then self.duty.sweep = self.duty.sweep + random(-a, a) end
if maybe(b) then self.vibrato.depth = self.vibrato.depth + random(-a, a) end
if maybe(b) then self.vibrato.speed = self.vibrato.speed + random(-a, a) end
if maybe(b) then self.vibrato.delay = self.vibrato.delay + random(-a, a) end
if maybe(b) then self.envelope.attack = self.envelope.attack + random(-a, a) end
if maybe(b) then self.envelope.sustain = self.envelope.sustain + random(-a, a) end
if maybe(b) then self.envelope.punch = self.envelope.punch + random(-a, a) end
if maybe(b) then self.envelope.decay = self.envelope.decay + random(-a, a) end
if maybe(b) then self.lowpass.resonance = self.lowpass.resonance + random(-a, a) end
if maybe(b) then self.lowpass.cutoff = self.lowpass.cutoff + random(-a, a) end
if maybe(b) then self.lowpass.sweep = self.lowpass.sweep + random(-a, a) end
if maybe(b) then self.highpass.cutoff = self.highpass.cutoff + random(-a, a) end
if maybe(b) then self.highpass.sweep = self.highpass.sweep + random(-a, a) end
if maybe(b) then self.phaser.offset = self.phaser.offset + random(-a, a) end
if maybe(b) then self.phaser.sweep = self.phaser.sweep + random(-a, a) end
if maybe(b) then self.change.speed = self.change.speed + random(-a, a) end
if maybe(b) then self.change.amount = self.change.amount + random(-a, a) end
if maybe(b) then self.repeatSpeed = self.repeatSpeed + random(-a, a) end
end
-- Constructor
function sfxr.newSound(...)