ProTrackR (version 0.3.7)

loopStart: The loop start position of a PTSample

Description

Extract or replace the loop start position of a PTSample.

Usage

# S4 method for PTSample
loopStart(sample)
# S4 method for PTSample
loopStart(sample) <- value

Value

For loopStart the loop start position (in samples), represented by an even integer value ranging from 0 up to 131070, is returned.

For loopStart<- A PTSample

sample, updated with the loop start position `value', is returned.

Arguments

sample

A PTSample for which the loop start position needs to be extracted or replace.

value

An even numeric value giving the loop starting position in samples ranging from 0 up to 131070. The sum of the loopStart and loopLength should not exceed the sampleLength.

Use a value of either character "off" or logical "FALSE", in order to turn off the loop all together.

Author

Pepijn de Vries

Details

PTSamples can have loops, marked by a starting position and length of the loop (in samples), for more details see the PTSample-class. This method can be used to extract the loop starting position or safely replace its value.

See Also

Other sample.operations: PTSample-class, PTSample-method, fineTune(), loopLength(), loopSample(), loopState(), name, playSample(), read.sample(), sampleLength(), volume(), waveform(), write.sample()

Other loop.methods: loopLength(), loopSample(), loopState()

Examples

data("mod.intro")

## get the loop start position of the
## first sample of mod.intro:

loopStart(PTSample(mod.intro, 1))

## Let's change the starting position of
## the loop to 500

loopStart(PTSample(mod.intro, 1)) <- 500

## Let's turn off the loop all together:

loopStart(PTSample(mod.intro, 1)) <- FALSE