Installing Demucs Locally?

❓ Questions

I genuinely have no idea what I’m doing wrong. I don’t have any Python experience, I just want to be able to run Demucs locally (I do have a GPU). Off the top of my head:

• I’ve installed python
• I’ve installed the anaconda prompt
• I’ve installed the github desktop client
• I’ve downloaded/installed pytorch
• I’ve run python.exe -m pip install -U demucs

However, none of the following from the Windows support page work:

cd %HOMEPATH%
git clone -b main --single-branch https://github.com/facebookresearch/demucs ./demucs

“‘git’ is not recognized as an internal or external command, operable program or batch file.” cd ./demucs “The system cannot find the path specified.” conda env update -f environment-cpu.yml EnvironmentFileNotFound: ‘C:\Users\Upstairs\environment-cpu.yml’ file not found conda activate demucs “Could not find conda environment: demucs. You can list all discoverable environments with conda info --envs.” python.exe -m pip install -e . “ERROR: File “setup.py” or “setup.cfg” not found. Directory cannot be installed in editable mode: C:\Users\Upstairs”

What am I doing wrong? Is there something I need to do to get Github to interface with the anaconda prompt?

[thesinepainter]

Hey, here’s a beginner’s guide to installing demucs locally from source:

Step 1 Open Anaconda Prompt

Step 2 Create a conda environment for demucs using: conda create --name demucs

Type y when prompted to proceed.

Step 3 Activate the environment with: conda activate demucs

Step 4 Install Pytorch for CUDA using: conda install pytorch torchvision torchaudio cudatoolkit=11.3 -c pytorch

Step 5 Since you’re only interested in running the code, no need to bother with the git command or GitHub desktop. Just download and extract the demucs-main zip from the Code dropdown on the main page:

Step 6 Install demucs by entering the following in the anaconda prompt window: pip install -e "PATH_TO_demucs-main"

Where PATH_TO_demucs-main is your path to the extracted demucs-main folder, so the final command might look like: pip install -e "C:\Users\username\Documents\demucs-main"

Step 7 Install PySoundFile audio backend using: pip install PySoundFile

That’s it, you’re all setup!

Step 8 Test if everything is running using: demucs -d cuda -o PATH_TO_OUTPUT_DIRECTORY PATH_TO_AUDIO_FILE

Now, whenever you want to run demucs:

• Open Anaconda Prompt - Step 1
• Activate demucs environment - Step 3
• Run demucs command - Step 8

Note: Usually you would use the .yml file to automatically create the environment and download all dependencies, but for some reason, environment-cuda.yml kept downloading the cpu version of pytorch, so I had to create the environment and install pytorch manually.

[KirbysAdventureMusic]

So, it turns out I was massively overcomplicating things! Since I had already run python.exe -m pip install -U demucs and pip install PySoundFile, all I needed to do was give it something to split - the Windows support page is irrelevant. Maybe this could be made clearer in the readme?

(Thanks again for your help, thesinepainter!)