Best Open Source Smule Alternative
A curated collection of the 1 best open source and self-hosted alternatives to Smule in 2026.
Looking for a free, privacy-friendly, or self-hosted replacement for Smule in 2026? The top open-source alternative is Nightingale — Turn any song into karaoke with AI stem separation.
Turn any song into karaoke with AI stem separation
Nightingale transforms your music library into a karaoke experience with neural network-powered stem separation, word-level lyrics alignment, real-time pitch scoring, and dynamic backgrounds. It ships as a single binary with no cloud dependency or complex setup. - Neural Stem Separation: Isolate vocals from instrumentals using UVR Karaoke or Demucs models with adjustable guide vocal volume. - Word-Level Lyrics: WhisperX transcribes and aligns every word to the audio, with LRCLIB integration for existing lyrics. - Multi-Language Support: CJK forced alignment for Japanese, Chinese, Cantonese, and Korean songs with romanized readings. - Pluggable ASR: Choose between Whisper (broad coverage) or Parakeet v3 (experimental) for ~25 European languages. - UltraStar Compatibility: Drop USDX song folders for instant pitch and lyrics playback without analysis. - Real-Time Pitch Scoring: Sing into your mic and receive star ratings with per-song scoreboards tracking progress. - Key & Tempo Controls: Adjust key and tempo after analysis to match your voice and comfort level. - Video File Support: Process .mp4 or .mkv files with separated vocals and original video as background. - Audio-Reactive Backgrounds: 10 GPU shaders reacting to mic input in real time, plus 5 Pixabay video flavors. - Self-Hosted Web Mode: Run Nightingale on a Linux box and access karaoke from any browser on your home network. - Multi-Platform Support: Native builds for Linux (.deb/.rpm), macOS, and Windows with signed in-app updates. - Player Profiles: Multiple profiles with separate score histories and personal best ratings. - Gamepad & Touch Support: Navigate menus with controllers and use touch playback controls on mobile devices. Nightingale is distributed as a single binary that bootstraps ffmpeg, Python, PyTorch, and ML models on first launch. It supports integration with local folders, Plex Media Server, Jellyfin, and Navidrome. The self-hosted web mode requires a Linux server and provides browser-based access across your home network. All audio processing and lyrics alignment occur locally with no cloud dependency.
About Smule
Smule is the world’s largest karaoke app, bringing people together through music. Whether you're a beginner or a seasoned performer, Smule offers 15M+ songs with scrolling lyrics, pitch guides, and professional voice effects to enhance your singing experience.
Key Features of Smule
- 15M+ Songs: Access a vast library of viral hits, timeless classics, and trending tracks.
- Solo & Duet Modes: Record performances solo or collaborate with friends and artists in real-time.
- Studio-Quality Tools: Enhance your voice with pitch shifting, reverb, and 50+ filters.
- Live Performances: Go live and interact with a global audience.
- Artist Duets: Perform side-by-side with top singers and creators.
- Community Engagement: Connect with millions of singers worldwide and share your performances.
- Mobile & Web Access: Available on iOS, Android, and web platforms.
Tech / Self-Hosting
Smule is a proprietary mobile and web application. It does not offer self-hosting options but provides native apps for seamless access across devices.