dot-shiftPitch: Shift pitch per sound

.shiftPitchR Documentation

Shift pitch per sound

Description

Internal soundgen function called by shiftPitch

Usage

.shiftPitch(
  audio,
  multPitch,
  multFormants,
  timeStretch,
  freqWindow = NULL,
  dynamicRange = 80,
  windowLength = 50,
  step = NULL,
  overlap = 75,
  wn = "gaussian",
  interpol = c("approx", "spline")[1],
  propagation = c("time", "adaptive")[1],
  preserveEnv = NULL,
  transplantEnv_pars = list(),
  normalize = c("max", "orig", "none")[2],
  play = FALSE
)

Arguments

audio

a list returned by readAudio

multPitch

1 = no change, >1 = raise pitch (eg 1.1 = 10% up, 2 = one octave up), <1 = lower pitch. Anchor format accepted for multPitch / multFormant / timeStretch (see soundgen)

multFormants

1 = no change, >1 = raise formants (eg 1.1 = 10% up, 2 = one octave up), <1 = lower formants

timeStretch

1 = no change, >1 = longer, <1 = shorter

freqWindow

the width of spectral smoothing window, Hz. Defaults to detected f0 prior to pitch shifting - see shiftFormants for discussion and examples

dynamicRange

dynamic range, dB. All values more than one dynamicRange under maximum are treated as zero

windowLength

length of FFT window, ms

step

you can override overlap by specifying FFT step, ms (NB: because digital audio is sampled at discrete time intervals of 1/samplingRate, the actual step and thus the time stamps of STFT frames may be slightly different, eg 24.98866 instead of 25.0 ms)

overlap

overlap between successive FFT frames, %

wn

window type accepted by ftwindow, currently gaussian, hanning, hamming, bartlett, rectangular, blackman, flattop

interpol

the method for interpolating scaled spectra and anchors

propagation

the method for propagating phase: "time" = horizontal propagation (default), "adaptive" = an experimental implementation of "vocoder done right" (Prusa & Holighaus 2017)

preserveEnv

if TRUE, transplants the amplitude envelope from the original to the modified sound with transplantEnv. Defaults to TRUE if no time stretching is performed and FALSE otherwise

transplantEnv_pars

a list of parameters passed on to transplantEnv if preserveEnv = TRUE

normalize

"orig" = same as input (default), "max" = maximum possible peak amplitude, "none" = no normalization

play

if TRUE, plays the synthesized sound using the default player on your system. If character, passed to play as the name of player to use, eg "aplay", "play", "vlc", etc. In case of errors, try setting another default player for play


soundgen documentation built on Aug. 14, 2022, 5:05 p.m.