Free & Open Source Karaoke Software
Process your music locally with AI-powered stem separation and lyric transcription. No vendor lock-in — uses open M4A Stems format compatible with DJ software.
Everything you need for professional karaoke, completely free and open source
Uses standard M4A Stems — no vendor lock-in. Works with Traktor, Serato, and other DJ software.
Process your audio files locally with Demucs stem separation and Whisper lyric transcription.
Individual volume, mute, and solo controls for vocals, drums, bass, and instruments.
Real-time pitch correction for microphone input with adjustable strength and musical key support.
Control playback and manage song requests from any device on your network via QR code.
Independent PA (music → speakers) and IEM (vocals → headphones) outputs with per-stem routing.
100 Milkdrop-style audio visualizations with Butterchurn. Multi-monitor support.
Fast library scanning and smart search. Tested with 23,000+ songs.
Luis + Karaoke + A.I. = Loukai. Built by a karaoke enthusiast, powered by love.
Process your personal music library locally
Drag your audio file (MP3, FLAC, WAV) into the Creator tab.
Demucs separates stems, Whisper transcribes lyrics, CREPE detects key — all on your computer.
Your .stem.m4a karaoke file is ready with synchronized lyrics and stem control.
Loukai is licensed under AGPL-3.0. Inspect the code, modify it, contribute improvements, or build your own tools on top of it. No subscriptions, no tracking, no vendor lock-in.