Module: DSP

Defined in:
lib/dsprb.rb,
lib/dsprb/dct.rb,
lib/dsprb/lpc.rb,
lib/dsprb/wav.rb,
lib/dsprb/yin.rb,
lib/dsprb/mfcc.rb,
lib/dsprb/curve.rb,
lib/dsprb/biquad.rb,
lib/dsprb/energy.rb,
lib/dsprb/errors.rb,
lib/dsprb/scales.rb,
lib/dsprb/window.rb,
lib/dsprb/fourier.rb,
lib/dsprb/framing.rb,
lib/dsprb/version.rb,
lib/dsprb/formants.rb,
lib/dsprb/resolver.rb,
lib/dsprb/spectrum.rb,
lib/dsprb/waveform.rb,
lib/dsprb/decimator.rb,
lib/dsprb/parabolic.rb,
lib/dsprb/pitch_track.rb,
lib/dsprb/mel_filterbank.rb,
lib/dsprb/autocorrelation.rb,
lib/dsprb/spectral_moments.rb,
sig/dsprb.rbs

Defined Under Namespace

Modules: Autocorrelation, Curve, Dct, Energy, Fourier, Framing, Lpc, Parabolic, Resolver, Scales, Wav, Window, _Transform, _WindowFunction Classes: Biquad, Decimator, Error, Formants, FormatError, MelFilterbank, Mfcc, PitchTrack, SpectralMoments, Spectrum, UnknownStrategyError, Waveform, Yin

Constant Summary collapse

VERSION =

Returns:

  • (String) 
"1.0.0"

Class Method Summary collapse

Class Method Details

.decimate(waveform, factor) ⇒ Waveform

Parameters:

Returns:



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# File 'lib/dsprb.rb', line 52

def decimate(waveform, factor) = Decimator.new(factor).call(waveform)

.decode(bytes) ⇒ Waveform

Parameters:

  • (::String)

Returns:



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# File 'lib/dsprb.rb', line 33

def decode(bytes) = Wav.decode(bytes)

.filter(waveform, biquad, sections) ⇒ Waveform

Parameters:

Returns:



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# File 'lib/dsprb.rb', line 62

def filter(waveform, biquad, sections)
  waveform.with(samples: biquad.apply(waveform.samples, sections: sections))
end

.formants(waveform, **options) ⇒ ::Array[::Float]

Parameters:

Returns:

  • (::Array[::Float]) 


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# File 'lib/dsprb.rb', line 37

def formants(waveform, **options) = Formants.new(**options).call(waveform)

.highpass(waveform, cutoff:, sections: 2) ⇒ Waveform

Parameters:

  • (Waveform)
  • cutoff: (::Numeric)
  • sections: (::Integer) (defaults to: 2)

Returns:



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# File 'lib/dsprb.rb', line 58

def highpass(waveform, cutoff:, sections: 2)
  filter(waveform, Biquad.highpass(sample_rate: waveform.sample_rate, cutoff: cutoff), sections)
end

.lowpass(waveform, cutoff:, sections: 2) ⇒ Waveform

Parameters:

  • (Waveform)
  • cutoff: (::Numeric)
  • sections: (::Integer) (defaults to: 2)

Returns:



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# File 'lib/dsprb.rb', line 54

def lowpass(waveform, cutoff:, sections: 2)
  filter(waveform, Biquad.lowpass(sample_rate: waveform.sample_rate, cutoff: cutoff), sections)
end

.mfcc(waveform, size: Mfcc::DEFAULT_SIZE, coefficients: Mfcc::DEFAULT_COEFFICIENTS, window_seconds: Mfcc::DEFAULT_WINDOW_SECONDS, hop_seconds: Mfcc::DEFAULT_HOP_SECONDS, **options) ⇒ Object 



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# File 'lib/dsprb.rb', line 39

def mfcc(
  waveform,
  size: Mfcc::DEFAULT_SIZE,
  coefficients: Mfcc::DEFAULT_COEFFICIENTS,
  window_seconds: Mfcc::DEFAULT_WINDOW_SECONDS,
  hop_seconds: Mfcc::DEFAULT_HOP_SECONDS,
  **options
)
  Mfcc
    .for(sample_rate: waveform.sample_rate, size: size, coefficients: coefficients, **options)
    .sequence(waveform, window_seconds: window_seconds, hop_seconds: hop_seconds)
end

.pitch(waveform, **options) ⇒ PitchTrack

Parameters:

Returns:



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# File 'lib/dsprb.rb', line 35

def pitch(waveform, **options) = Yin.new(**options).call(waveform)

.read(path) ⇒ Waveform

Parameters:

  • (::String)

Returns:



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# File 'lib/dsprb.rb', line 31

def read(path) = Wav.read(path)