Pymss vs Stemelo

Pymss is an open-source music source-separation toolchain that runs on the user's own machine and separates audio into vocals, drums, bass, and other stems. Its Studio desktop workspace handles model management, batch jobs, and stem editing. Users can import files or folders, choose a downloaded model, configure inference, and queue work. Studio can browse, download, resume, and delete model files, with storage cleanup controls. Waveform previews, mix controls, saved projects, and stem export support work on the results. Pymss can chain models so each workflow step uses the preceding step's output. The inference package lists WAV, FLAC, MP3, M4A, AAC, Opus, Vorbis, and Ogg output. Other components include ComfyUI custom nodes, a VST3 ARA plugin for compatible DAWs, and a browser interface bundled with the server. The ARA plugin provides per-stem mute and solo controls; its README gives Reaper and Studio One as host examples. The repositories have separate licenses: Studio is listed under AGPL-3.0 and the inference package under MIT. Studio remains at an early development stage, and changes between versions may break things.

Stemelo is a web-based AI audio stem studio for musicians, producers, and creators. It separates songs into stems, extracts vocals, creates instrumentals, and prepares practice tracks directly in a browser, without installing audio software. Tools include an instrumental maker, drum remover, acapella extractor, stem splitter, vocal remover, karaoke maker, bass remover, and drumless-track maker. Uploads support MP3 or WAV files up to 50 MB. Guests can process tracks up to five minutes, while signed-in users can submit tracks up to 15 minutes. Guest access provides three processing attempts and 60-second previews without downloads. A free account adds three attempts and one full export shared across tools. Pro plans add full-length MP3 exports and private project history. Pro Monthly costs $9.90 a month with 300 processing minutes; Pro Annual costs $58.80 a year with 3,600 minutes. Failed or canceled paid jobs restore reserved minutes.