getFrameBank: Frame bank

In soundgen: Sound Synthesis and Acoustic Analysis

Frame bank

Description

Internal soundgen function.

Usage

getFrameBank(
  sound,
  samplingRate,
  windowLength_points,
  wn,
  step,
  zp,
  normalize = TRUE,
  filter = NULL,
  padWithSilence = FALSE,
  timeShift = NULL
)

Arguments

sound	numeric vector
samplingRate	sampling rate of x (only needed if x is a numeric vector)
windowLength_points	length of fft window (points)
wn	window type accepted by ftwindow, currently gaussian, hanning, hamming, bartlett, blackman, flattop, rectangle
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)
zp	window length after zero padding, points
normalize	if TRUE, scales input prior to FFT
filter	fft window filter (defaults to NULL)
padWithSilence	if TRUE, pads the sound with just enough silence to resolve the edges properly (only the original region is plotted, so the apparent duration doesn't change)
timeShift	time (s) added to timestamps

Details

A subroutine of spec that saves windowed (and optionally zero-padded) frames, i.e. chunks of the sound file of the right size and spacing. Handy for further processing.

Value

A matrix with nrow = windowLength_points/2 and ncol depending on length(sound) and step

Examples

a = soundgen:::getFrameBank(sin(1:1000), 16000, 512, 'gaussian', 15, 0)

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