sonicscrewdriver (version 0.0.7)

beatSpectrum: Computes a beat spectrum

Description

Beat spectra represent the periodicity in signal amplitude. It is computed by performing a continuous wavelet transform on the envelope of a preprocessed signal, and processing the average power per frequency band.

Usage

beatSpectrum(wave, min_period = 0.005, max_period = 30, dj = 1/32, ...)

Value

a spectrum as a data frame. It contains two columns: power and period. The number of rows depend on the resolution and frequency range.

Arguments

wave

an R object or path to a wave file

min_period

the minimal rythmicity period expected, in seconds

max_period

the maximal rythmicity period expected, in seconds

dj

the frequency resolution of the cwt (in voices per octave)

...

extra arguments passed to analyze.wavelet()

Author

Quentin Geissmann

Examples

if (FALSE) {
beatSpectrum(sheep)
beatSpectrum(sheep, min_period=0.005, max_period=30, dj=1/32)
}