smst.models.hpr module

Functions that implement analysis and synthesis of sounds using the Harmonic plus Residual Model.

smst.models.hpr.from_audio(x, fs, w, N, H, t, minSineDur, nH, minf0, maxf0, f0et, harmDevSlope)

Analyzes a sound using the harmonic plus residual model.

Parameters:
  • x – input sound
  • fs – sampling rate
  • w – analysis window
  • N – FFT size
  • t – threshold in negative dB
  • minSineDur – minimum duration of sinusoidal tracks
  • nH – maximum number of harmonics
  • minf0 – minimum fundamental frequency in sound
  • maxf0 – maximum fundamental frequency in sound
  • f0et – maximum error accepted in f0 detection algorithm
  • harmDevSlope – allowed deviation of harmonic tracks, higher harmonics have higher allowed deviation
Returns:

  • hfreq, hmag, hphase: harmonic frequencies, magnitude and phases
  • xr: residual signal
smst.models.hpr.to_audio(hfreq, hmag, hphase, xr, N, H, fs)

Synthesizes a sound using the sinusoidal plus residual model.

Parameters:
  • tfreq – sinusoidal frequencies
  • tmag – sinusoidal amplitudes
  • tphase – sinusoidal phases
  • stocEnv – stochastic envelope
  • N – synthesis FFT size
  • H – hop size
  • fs – sampling rate
Returns:

y: output sound, yh: harmonic component