Free & Open Source Karaoke System
Create and play karaoke files using 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.
Convert any song to karaoke 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.
Turn your music library into karaoke in minutes
Drag any audio file (MP3, FLAC, WAV) or paste a URL into the Creator tab.
Demucs separates stems, Whisper transcribes lyrics, CREPE detects pitch — all automatically.
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 karaoke system on top of it. No subscriptions, no tracking, no vendor lock-in.