StemStudio
Separate vocals and instruments, then make a mix.
StemStudio is a free, open-source Mac app I built for working with songs in separate parts. Import audio, video, or a public YouTube link, then separate the vocals and instruments.
You can compare results, turn individual parts up or down, and export a mix or separate tracks. Processing and files stay on your Mac. I built the interface in React and packaged it with a local Python backend.
