noSilence {tuneR}

Cut off silence from a Wave or WaveMC object

Description

Generic function to cut off silence or low noise at the beginning and/or at the end of an object of class Wave or class WaveMC.

Usage

noSilence(object, zero = 0, level = 0, where = c("both", "start", "end"))

Arguments

object

Object of class Wave or class WaveMC.

zero

The zero level (default: 0) at which ideal cut points are determined (see Details). A typical alternative would be 127 for 8 bit Wave or WaveMC objects. If zero = NA, the mean of the left Wave channel (for Wave, resp. the mean of the first channel for WaveMC) is taken as zero level.

level

Values in the interval between zero and zero - level/zero + level are considered as silence.

where

One of "both" (default), "start", or "end" indicating at where to prepare the Wave or WaveMC object for concatenation.

Details

Silcence is removed at the locations given by where of the Wave or WaveMC object, where silence is defined such that (in both channels if stereo, in all channels if multichannel for WaveMC) all values are in the interval between zero - level and zero + level. All values before (or after, respectively) the first non-silent value are removed from the object.

Value

An object of class Wave or WaveMC.

Author(s)

Uwe Ligges [e-mail], Sarah Schnackenberg, based on code from Matthias Heymann's former package ‘sound’.

See Also

silence, Wave-class, Wave, WaveMC-class, WaveMC, extractWave