How does Stemverter 2 work?

Stemverter 2 is a macOS front-end GUI for Spleeter, an open source command line tool developed by Deezer labs that processes audio files using stem separation engine powered by Google’s Tensor Flow. According to Deezer’s documentation on GitHub, Spleeter is a:

“source separation library with pretrained models written in Python and uses Tensorflow. It makes it easy to train source separation model (assuming you have a dataset of isolated sources), and provides already trained state of the art model for performing various flavour of separation :

• Vocals (singing voice) / accompaniment separation (2 stems)
• Vocals / drums / bass / other separation (4 stems)
• Vocals / drums / bass / piano / other separation (5 stems)”
By bringing Spleeter into a drag-and-drop interface for macOS users on systems 10.12 Sierra – 11.0 Big Sur, cflo inc. has provided an accessible solution for users who want to convert their audio files into stems for use in live performance or audio production projects.

Does Stemverter 2 do anything else?


Along with the Spleeter engine, Stemverter 2 also includes many additional features that streamline the conversion process and make file management a breeze, including direct to mp3 conversion, ID3 cloning, batch conversion, and automatic smart file naming. Stemverter 2 is also the only Desktop App that converts files using 100% local processing power as well as writes files to the user’s filesystem for later use. By bringing Stemverter 2 to the market, cflo inc. has made this amazing tool accessible to users who otherwise would not have the access or technical know-how to install the command-line version.

Please note that some songs output will contain transients and other frequencies that may sound filtered in a way that’s not to the user’s ideal spec. This is normal, and a result of the models Stemverter 2 employs that are the reference for which frequencies are filtered during the stem separation process. We will issue updates to Stemverter 2 in order to add new features and fixes, so please be sure to check for updates!