class AudioStream::Fx::Phaser
Public Class Methods
new(soundinfo, rate:, depth:, freq:, dry: -6.0, wet: -6.0)
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@param soundinfo [AudioStream::SoundInfo] @param rate [AudioStream::Rate] modulation speed @param depth [Float] frequency modulation depth @param freq [Float] Base cutoff frequency @param dry [AudioStream::Decibel] dry gain @param wet [AudioStream::Decibel] wet gain
# File lib/audio_stream/fx/phaser.rb, line 11 def initialize(soundinfo, rate:, depth:, freq:, dry: -6.0, wet: -6.0) @soundinfo = soundinfo @filters = [ AllPassFilter.new(soundinfo), AllPassFilter.new(soundinfo), ] @speed = rate.frame_phase(soundinfo) @phase = 0 @depth = depth @freq = freq @dry = Decibel.create(dry).mag @wet = Decibel.create(wet).mag end
Public Instance Methods
process(input)
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# File lib/audio_stream/fx/phaser.rb, line 29 def process(input) window_size = input.window_size @phase = (@phase + @speed) % (2.0 * Math::PI) a = Math.sin(@phase) * 0.5 + 0.5 apf_freq = @freq * (1.0 + a * @depth) wet = input @filters.each {|filter| filter.update_coef(freq: apf_freq, q: BiquadFilter::DEFAULT_Q) wet = filter.process(wet) } streams = wet.streams.map.with_index {|wet_stream, i| dry_stream = input.streams[i] dry_stream * @dry + wet_stream * @wet } Buffer.new(*streams) end