getPitchCep: Cepstral pitch tracker

In soundgen: Sound Synthesis and Acoustic Analysis

Cepstral pitch tracker

Description

Internal soundgen function.

Usage

getPitchCep(
  frame,
  samplingRate,
  bin,
  nCands,
  cepThres,
  cepZp,
  pitchFloor,
  pitchCeiling,
  tol = 0.05,
  specMerge = 2/12
)

Arguments

frame	the abs spectrum of a frame, as returned by fft
samplingRate	sampling rate (Hz)
bin	spectrogram bin width, Hz
nCands	maximum number of pitch candidates per method, normally 1...4 (except for dom, which returns at most one candidate per frame)
cepThres	voicing threshold (unitless, ~0 to 1)
cepZp	zero-padding of the spectrum used for cepstral pitch detection (final length of spectrum after zero-padding in points, e.g. 2 ^ 13)
pitchFloor, pitchCeiling	absolute bounds for pitch candidates (Hz)
tol	tolerance when removing false subharmonics
specMerge	tolerance when removing similar candidates, oct

Details

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

Value

Returns either NULL or a dataframe of pitch candidates and CPP.

soundgen documentation built on Sept. 12, 2024, 6:29 a.m.