smst.models.spr module

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

smst.models.spr.from_audio(x, fs, w, N, H, t, minSineDur, maxnSines, freqDevOffset, freqDevSlope)

Analyzes a sound using the sinusoidal 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
  • maxnSines – maximum number of parallel sinusoids
  • freqDevOffset – frequency deviation allowed in the sinusoids from frame to frame at frequency 0
  • freqDevSlope – slope of the frequency deviation, higher frequencies have bigger deviation
Returns:

hfreq, hmag, hphase: harmonic frequencies, magnitude and phases; xr: residual signal
smst.models.spr.to_audio(tfreq, tmag, tphase, 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
  • ys: sinusoidal component