Internal soundgen function.
getPitchCep(
frame,
samplingRate,
nCands,
cepThres,
cepSmooth,
cepZp,
pitchFloor,
pitchCeiling
)the abs spectrum of a frame, as returned by
fft
sampling rate (Hz)
maximum number of pitch candidates per method (except for
dom, which returns at most one candidate per frame), normally 1...4
voicing threshold (unitless, ~0 to 1)
the width of smoothing interval (Hz) for finding peaks in the cepstrum
zero-padding of the spectrum used for cepstral pitch detection (final length of spectrum after zero-padding in points, e.g. 2 ^ 13)
absolute bounds for pitch candidates (Hz)
absolute bounds for pitch candidates (Hz)
Returns either NULL or a dataframe of pitch candidates.
Attempts to find F0 of a frame by looking for peaks in the cepstrum. See http://www.phon.ucl.ac.uk/courses/spsci/matlab/lect10.html