class AudioStream::Fx::Equalizer2band
Public Class Methods
new(soundinfo, lowfreq: 400.0, lowgain:, highfreq: 4000.0, highgain:)
click to toggle source
@param freq [Float] Cutoff frequency @param q [Float] Quality factor @param gain [AudioStream::Decibel] Amplification level at cutoff frequency
# File lib/audio_stream/fx/equalizer_2band.rb, line 7 def initialize(soundinfo, lowfreq: 400.0, lowgain:, highfreq: 4000.0, highgain:) @low_filter = LowShelfFilter.create(soundinfo, freq: lowfreq, q: BiquadFilter::DEFAULT_Q, gain: lowgain) @high_filter = HighShelfFilter.create(soundinfo, freq: highfreq, q: BiquadFilter::DEFAULT_Q, gain: highgain) end
Public Instance Methods
plot(width=500)
click to toggle source
# File lib/audio_stream/fx/equalizer_2band.rb, line 17 def plot(width=500) data1 = @low_filter.plot_data(width) data2 = @high_filter.plot_data(width) data = { x: data1[:x], magnitude: [data1[:magnitude], data2[:magnitude]].transpose.map {|a| a[0] + a[1]}, phase: [data1[:phase], data2[:phase]].transpose.map {|a| a[0] + a[1]}, } Plotly::Plot.new( data: [{x: data[:x], y: data[:magnitude], name: 'Magnitude', yaxis: 'y1'}, {x: data[:x], y: data[:phase], name: 'Phase', yaxis: 'y2'}], layout: { xaxis: {title: 'Frequency (Hz)', type: 'log'}, yaxis: {side: 'left', title: 'Magnitude (dB)', showgrid: false}, yaxis2: {side: 'right', title: 'Phase (deg)', showgrid: false, overlaying: 'y'} } ) end
process(input)
click to toggle source
# File lib/audio_stream/fx/equalizer_2band.rb, line 12 def process(input) input = @low_filter.process(input) input = @high_filter.process(input) end