DEV-TOOLSMarch 18, 20261 min read12 views

Nightingale – open-source karaoke app that works with any song on your computer

Nightingale is a powerful open-source karaoke application that uses AI to separate vocals and provide real-time pitch scoring. It supports multiple platforms and allows users to transform any local audio or video file into a karaoke track.

Features

🎤 Stem separation

Vocals are isolated from instrumentals using the UVR Karaoke model or Demucs. Guide vocal volume is adjustable.

📝 Word-level lyrics

WhisperX transcribes and aligns every word to the audio. Existing lyrics from LRCLIB are used when available.

🎯 Pitch scoring

Sing into your mic and get scored in real-time. Star ratings and per-song scoreboards track your progress.

👤 Player profiles

Multiple profiles with separate score histories. Switch between singers without losing anyone's records.

🎬 Video file support

Drop .mp4 or .mkv files into your library. Vocals are separated and the original video plays as the background.

🌌 Dynamic backgrounds

GPU shader effects (plasma, aurora, nebula...), Pixabay video loops, or the source video for video files.

🎮 Gamepad

Navigate menus, pick songs, and control playback entirely with a controller. D-pad, sticks, face buttons.

📦 Single binary

ffmpeg, Python, PyTorch, and the ML models are all bootstrapped on first launch. Nothing to install.

How it works

Separate

UVR Karaoke or Demucs splits the track into vocals and instrumental. Audio is extracted from video files automatically.

Transcribe

Synced lyrics are looked up on LRCLIB first. If nothing's found, WhisperX transcribes the vocals with word-level alignment.

Play

The instrumental plays back with highlighted lyrics, pitch scoring, dynamic backgrounds, and gamepad support.

Platforms

Runs on Linux, macOS, and Windows. GPU acceleration via CUDA or Metal when available, CPU fallback everywhere else.

Linuxx86_64, aarch64

macOSARM, Intel

Windowsx86_64

Source: Hacker News

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