harmHeight: Height of harmonics

In soundgen: Sound Synthesis and Acoustic Analysis

Height of harmonics

Description

Internal soundgen function

Usage

harmHeight(
  frame,
  pitch,
  bin,
  freqs,
  harmThres = 3,
  harmTol = 0.25,
  harmPerSel = 5
)

Arguments

frame	the abs spectrum of a frame, as returned by fft
pitch	the final pitch estimate for the current frame
bin	spectrogram bin width, Hz
freqs	frequency per bin of spectrogram
harmThres	minimum height of spectral peak, dB
harmTol	maximum tolerated deviation of peak frequency from multiples of f0, proportion of f0
harmPerSel	the number of harmonics per sliding selection

Details

Attempts to estimate how high harmonics reach in the spectrum - that is, at what frequency we can still discern peaks at multiples of f0 or, for low-pitched sounds, regularly spaced peaks separated by ~f0.

Value

Returns the frequency (Hz) up to which we find harmonics

Examples

s = soundgen(sylLen = 400, addSilence = 0, pitch = 400, noise = -10,
  rolloff = -15, jitterDep = .1, shimmerDep = 5, temperature = .001)
sp = spectrogram(s, samplingRate = 16000)
hh = soundgen:::harmHeight(sp[, 5], pitch = 400,
  freqs = as.numeric(rownames(sp)) * 1000, bin = 16000 / 2 / nrow(sp))

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