dot-shiftFormants: Shift formants per sound
In tatters/soundgen: Sound Synthesis and Acoustic Analysis

.shiftFormants

R Documentation

Shift formants per sound

Description

Internal soundgen function called by shiftFormants

Usage

.shiftFormants(
  audio,
  multFormants,
  freqWindow = NULL,
  spec = NULL,
  dynamicRange = 80,
  windowLength = 50,
  step = NULL,
  overlap = 75,
  wn = "gaussian",
  interpol = c("approx", "spline")[1],
  normalize = c("max", "orig", "none")[2],
  play = FALSE
)

Arguments

`audio`	a list returned by `readAudio`
`multFormants`	1 = no change, >1 = raise formants (eg 1.1 = 10% up, 2 = one octave up), <1 = lower formants. Anchor format accepted (see `soundgen`)
`freqWindow`	the width of spectral smoothing window, Hz. Defaults to detected f0
`spec`	precomputed spectrogram
`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
`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`