Sac is a python command line tool based on Sox which splits wave files using time boundaries defined in a labels file and afterwards concatenates them according to their class identifiers.
To verify that you have a working sac installation do:
sac -h
and you should see the following output
usage: sac [-h] {split-wav,concat-wav,split-concat-wav} ...
positional arguments:
{split-wav,concat-wav,split-concat-wav}
split-wav Splits a wave files in segments using boundaries and
class names provided in a labels file
concat-wav Combines wav files generated using the split-wav
command.
split-concat-wav Splits and combines multiple wav files.
optional arguments:
-h, --help show this help message and exit
Lets suppose that we have the following labels-wavs.txt file and we want to generate the concatenated wav files under the output dir.
The contents of the labels-wavs.txt should be relative to itself.
audio_1.labels.txt,audio_1.wav
audio_2.labels.txt,audio_2.wav
We run:
sac split-concat-wav -i path/to/labels-wavs.txt -o output
If our label files look like the following:
25.407824 27.037760 v
28.571817 29.530603 v
33.653382 35.762711 v
49.665105 53.596127 m
55.417820 56.664242 v
116.013084 118.601806 v
Then we expect the output directory to contain the following files:
concat_m.wav
concat_v.wav