class AudioStream::Fx::GraphicEqualizer

Public Class Methods

new(soundinfo) click to toggle source
# File lib/audio_stream/fx/graphic_equalizer.rb, line 4
def initialize(soundinfo)
  @soundinfo = soundinfo
  @filters = []
end

Public Instance Methods

add(freq:, bandwidth: 1.0, gain:) click to toggle source
# File lib/audio_stream/fx/graphic_equalizer.rb, line 9
def add(freq:, bandwidth: 1.0, gain:)
  @filters << PeakingFilter.create(@soundinfo, freq: freq, bandwidth: bandwidth, gain: gain)
  self
end
plot(width=500) click to toggle source
# File lib/audio_stream/fx/graphic_equalizer.rb, line 21
def plot(width=500)
  data_arr = @filters.map{|filter| filter.plot_data(width)}

  data = {
    x: data_arr[0][:x],
    magnitude: data_arr.map{|d| d[:magnitude]}.transpose.map {|a| a.sum},
    phase: data_arr.map{|d| d[:phase]}.transpose.map {|a| a.sum},
  }

  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/graphic_equalizer.rb, line 14
def process(input)
  @filters.each {|filter|
    input = filter.process(input)
  }
  input
end