getAM: Get amplitude modulation

In soundgen: Sound Synthesis and Acoustic Analysis

Get amplitude modulation

Description

Internal soundgen function

Usage

getAM(m, amRange = c(10, 100), amRes = NULL)

Arguments

m	numeric matrix of non-negative values with colnames giving temporal modulation frequency
amRange	the range of temporal modulation frequencies that we are interested in as "amplitude modulation" (AM), Hz
amRes	controls the width of window over which we look for local maxima

Details

Helper function for calculating amplitude modulation based on the modulation spectrum. Algorithm: averages AM across all FM bins in the positive half of the modulation spectrum and looks for a peak in the specified AM frequency range.

Value

Returns a list with the frequency (Hz) and depth of amplitude modulation (dB relative to global max, normally at 0 Hz).

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