demix 1.0.3

Separate audio into stems (vocals, instruments) using AI-powered Spleeter

demix

separates audio from songs into stems (vocals, instruments), transpose music, change tempo, operates on music from youtube video or local file

installation

I suggest to create virtualenv for this project to not break existing system-wide installations (replace python path below with your own python3.8 path):

brew install virtualenvwrapper
brew install ffmpeg
mkdir demix-cli
cd demix-cli
mkvirtualenv -p /Users/pw/.pyenv/versions/3.8.16/bin/python demix-cli
workon demix-cli
pip install demix
demix -v

[!NOTE] Please note: I'm using homebrew for installing virtualenvwrapper and ffmpeg. If you're using another package manager or different operating system than macOS (e.g. Linux), you need to install it differently.

update

pip install demix --upgrade

development

prepare environment (replace python path below with your own python3.8 path):

brew install virtualenvwrapper
brew install ffmpeg
mkvirtualenv -p /Users/pw/.pyenv/versions/3.8.16/bin/python demix
workon demix
pip install -r requirements.txt
python demix.py -v

[!NOTE] Please note: I'm using homebrew for installing virtualenvwrapper and ffmpeg. If you're using another package manager or different operating system than macOS (e.g. Linux), you need to install it differently.

virtualenv

exit virtualenv, when you're done:

deactivate

to activate env again:

for user installation:

workon demix-cli

for dev setup:

workon demix

[!TIP] You can change local names of these envs if you want to.

testing

install pytest:

pip install pytest

run all tests (-v param for verbose):

pytest -v

usage

demix -u <youtube-url> [options]
demix -f <audio-file> [options]

options

Option	Description
-u, --url	YouTube video URL to process
-f, --file	Local audio file to process (mp3, wav, flac, etc.)
-o, --output	Output directory (default: output)
-t, --tempo	Tempo factor for output audio (default: 1.0, use < 1.0 to slow down)
-p, --transpose	Transpose pitch by semitones (default: 0, range: -12 to +12)
-ss, --start	Start time for cutting (format: MM:SS or HH:MM:SS)
-to, --end	End time for cutting (format: MM:SS or HH:MM:SS)
-m, --mode	Separation mode: 2stems, 4stems, or 5stems (default: 2stems)
-c, --clean	Clean up files: output, models, or all
-v, --version	Show version number
-h, --help	Show help message

separation modes

Mode	Stems
2stems	vocals, accompaniment
4stems	vocals, drums, bass, other
5stems	vocals, drums, bass, piano, other

examples

# separate a YouTube video into vocals and accompaniment
demix -u 'https://www.youtube.com/watch?v=VIDEO_ID'

# separate a local file with 4 stems
demix -f /path/to/song.mp3 -m 4stems

# cut audio from 1:30 to 3:45 before separation
demix -f song.mp3 -ss 1:30 -to 3:45

# start from 0:30 (skip intro)
demix -f song.mp3 -ss 0:30

# keep only the first 2 minutes
demix -f song.mp3 -to 2:00

# combine cutting with tempo and transpose
demix -f song.mp3 -ss 1:00 -to 4:00 -t 0.8 -p -2