audio slicing through transient detection
I've been using a DAW to do this manually for a while, thought I would save
myself some time. This script should be able to process whatever filetypes ffmpeg
supports, according to pydub documentation.
Install can be done by running pipx install ..
usage: asli [-h] [-t THRESHOLD] [-i] [-o OUTPUT] [-d] [-f FORMAT] [-e EVERY]
[-m MAX_SLICES] [-c COOLDOWN] [--fadeo FADEO] [--fadei FADEI]
[--fadeout-all] [--fadein-all] [--db DB] [--hpf HPF] [--lpf LPF]
[--bpf BPF] [--trim-end TRIM_END] [--trim-start TRIM_START]
files [files ...]
audio slicer tool
positional arguments:
files audio files to slice
options:
-h, --help show this help message and exit
-t THRESHOLD, --threshold THRESHOLD
set threshold for transient detection [def=3.0]
-i, --keep-intro treat beginning of file as transient
-o OUTPUT, --output OUTPUT
write audio slices to directory (implies -d)
-d, --to-dir write audio slices to directory named after file
-f FORMAT, --format FORMAT
format of sliced audio clips
-e EVERY, --every EVERY
slice every EVERY seconds instead of at transients
-m MAX_SLICES, --max-slices MAX_SLICES
maximum number of slices to write (will skip trailing
slices)
-c COOLDOWN, --cooldown COOLDOWN
minimum seconds between transients [def=0.05]
--fadeo FADEO add fade out at last FADEO seconds of slice
--fadei FADEI add fade in at first FADEO seconds of slice
--fadeout-all fade out audio clips start to finish (or half with
fade in)
--fadein-all fade in audio clips start to finish (or half with fade
out)
--db DB minimum NEGATIVE db value to treat as transient
[def=20]
--hpf HPF find transients while applying highpass filter at freq
--lpf LPF find transients while applying lowpass filter at freq
--bpf BPF find transients while applying bandpass filter at freq
--trim-end TRIM_END number of seconds to trim off end of clips
--trim-start TRIM_START
number of seconds to trim off beginning of clips$ # slice multiple audio files to separate named directories
$ python3 asli.py -d audio1.wav audio2.mp3 audio3.flac
file: audio1.wav transients: 73
file: audio2.mp3 transients: 73
file: audio3.flac transients: 73
$ # slice audio at transients with db > -6.0 db
$ python3 asli.py --db 6.0 audio1.wav
file: audio1.wav transients: 32
$ # slice audio, detecting transients with a >5.0 change-in-rms ratio
$ python3 asli.py -t 5.0 audio.wav
file: audio.wav transients: 41
$ # slice audio to specific directory
$ python3 asli.py -o some/directory/path audio.wav
file: audio.wav transients: 73
$ # slice audio that has been highpassed at 500hz
$ # the output is not highpassed! highpassing occurs during transient detection
$ python3 asli.py -o some/directory/path audio.wav
file: audio.wav transients: 80
$ # slice audio every 0.7 seconds instead of at transients
$ python3 asli.py -e 0.7 audio.wav
file: audio.wav divisions: 35