warbleR (version 1.1.17)

mp32wav: Convert .mp3 files to .wav

Description

mp32wav converts several .mp3 files in working directory to .wav format

Usage

mp32wav(samp.rate = NULL, parallel = 1, path = NULL, 
 dest.path = NULL, bit.depth = 16, pb = TRUE, overwrite = FALSE)

Arguments

samp.rate

Sampling rate in kHz at which the .wav files should be written. If not provided the sample rate of the original .mp3 file is used. Downsampling is done using the resample function from the bioacoustics package (which should be installed), which seems to generate aliasing. This can be avoided by downsampling after .mp3's have been converted using the fix_wavs function (which uses SOX instead). Default is NULL (e.g. keep original sampling rate).

parallel

Numeric. Controls whether parallel computing is applied. It specifies the number of cores to be used. Default is 1 (i.e. no parallel computing).

path

Character string containing the directory path where the .mp3 files are located. If NULL (default) then the current working directory is used.

dest.path

Character string containing the directory path where the .wav files will be saved. If NULL (default) then the folder containing the sound files will be used.

bit.depth

Character string containing the units to be used for amplitude normalization. Check normalize for details. Default is 16.

pb

Logical argument to control progress bar. Default is TRUE.

overwrite

Logical. Control whether a .wav sound file that is already in the working directory should be overwritten.

Value

.wav files saved in the working directory with same name as original mp3 files.

Details

The function will convert all mp3 files in working directory or 'path' supplied to wav format. bioacoustics package must be installed when changing sampling rates (i.e. if 'samp.rate' is supplied). Note that sound files are normalized using normalize so they can be written by writeWave.

convert all .mp3 files in working directory to .wav format. Function used internally to read .mp3 files (readMP3) sometimes crashes.

References

Araya-Salas, M., & Smith-Vidaurre, G. (2017). warbleR: An R package to streamline analysis of animal acoustic signals. Methods in Ecology and Evolution, 8(2), 184-191.

Examples

# NOT RUN {
# download mp3 files from xeno-canto
querxc(qword = "Phaethornis aethopygus", download = TRUE, path = tempdir())

# Convert all files to .wav format
mp32wav(path = tempdir(), dest.path = tempdir())

#check this folder!!
tempdir()
# }
# NOT RUN {
# }