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StemRoller
What it is
StemRoller is a free desktop app for creating vocal, karaoke, and instrumental tracks from songs. Users search by song title, and the app finds songs online using YouTube search results. It separates a song into vocals, drums, bass, and everything else, then creates an instrumental mix from the non-vocal stems. The separation uses Demucs, a machine-learning project, and the maker describes StemRoller as open source. Processing a song takes several minutes, and batch processing is not available. StemRoller is offered for macOS and Windows; the homepage links to a macOS ZIP and a Windows CUDA executable, version 3.1.1. Linux is not officially supported, although the README provides manual dependency setup instructions. The app is described as free, with no free trial. Its README offers the Unlicense or MIT No Attribution license, and users with questions or issues can request help on Discord.
For and against
For
- Creates vocals, drums, bass, and other stems.
- Builds an instrumental mix from non-vocal stems.
- Searches for songs by title.
- Described by its maker as free and open source.
- Available for macOS and Windows.
Against
- Splitting a song takes several minutes.
- Batch processing is not available.
- Linux is not officially supported.
The verdict
StemRoller offers a straightforward way to create separate song stems and an instrumental mix. Its desktop support is limited to macOS and Windows, and processing takes several minutes.
Who it suits
StemRoller suits people who want vocal, drum, bass, and instrumental tracks from songs on a macOS or Windows desktop. It may be useful for karaoke or other stem-based projects.
Plans and prices
Free
Free to use; makes vocals, drums, bass, other instrumental stems and an instrumental track
Read 5 Oct 2026 · stemroller.com
On the record
- Algorithm
- StemRoller uses Demucs, a machine learning project, to separate stems.stemroller.com · read 4 Oct 2026
- Downloads
- The homepage links to a macOS ZIP and a Windows CUDA executable, version 3.1.1.stemroller.com · read 5 Oct 2026
- Instrumental
- It creates an instrumental by mixing together all non-vocal stems.stemroller.com · read 5 Oct 2026
- Integrations
- StemRoller uses YouTube search results to find songs, according to its GitHub README.github.com · read 5 Oct 2026
- License
- The repository offers a choice of Public Domain (Unlicense) or MIT No Attribution licensing.github.com · read 5 Oct 2026
- Linux support
- Linux is not officially supported; the README gives manual dependency setup instructions for Linux.github.com · read 5 Oct 2026
- Machine learning
- The product is based on Facebook's Demucs machine learning research project.stemroller.com · read 5 Oct 2026
- Open source
- StemRoller describes itself as open source.stemroller.com · read 5 Oct 2026
- Price
- The maker describes StemRoller as totally free.stemroller.com · read 4 Oct 2026
- Processing time
- The GitHub README says stem splitting takes several minutes.github.com · read 5 Oct 2026
- Purpose
- StemRoller creates karaoke, vocal, and stem tracks from songs.stemroller.com · read 5 Oct 2026
- Song search
- Users can search for a song by title and StemRoller finds it online.stemroller.com · read 5 Oct 2026
- Stem separation
- It splits songs into vocals, drums, bass, and everything else.stemroller.com · read 5 Oct 2026
- Support
- The maker offers help through its Discord server.stemroller.com · read 5 Oct 2026
- YouTube
- The project README says StemRoller integrates search results from YouTube.github.com · read 4 Oct 2026
