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Stemroller
Free desktop tool for AI-powered audio stem separation
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Stemroller - 2026 Pricing, Features, Reviews & Alternatives
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Last updated: September 2026
Stemroller overview
What is Stemroller?
Stemroller is a free, open-source desktop application that uses AI and machine learning to perform audio source separation on any song or recording. Built on Facebook's Demucs research project, it isolates mixed audio into four discrete stems: vocals, instrumental (karaoke), drums, and bass. The extraction process requires a single click, making advanced audio separation accessible to users without technical audio engineering backgrounds.
Targeted at musicians, music producers, DJs, karaoke enthusiasts, and general consumers, Stemroller supports a wide range of use cases including remixing, practice, karaoke track generation, and audio analysis. As a downloadable desktop application, it runs locally without requiring a subscription, cloud account, or per-use fee. The open-source model means the codebase is publicly available, and community support is provided through Discord.
For audio engineering and music production workflows, Stemroller delivers stem-level access to any audio recording without the cost barrier of commercial alternatives. The AI-driven separation engine handles the complexity of isolating overlapping frequency ranges across instruments and vocals, producing four export-ready tracks from a single source file.
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Stemroller has the following typical customers:
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