What is Next Karaoke?
Next Karaoke is a client-side Web-Native Karaoke and MIDI Workstation. It processes SoundFont 2 (.sf2) sample libraries and MIDI events inside your web browser with zero server reliance.
Using a multi-threaded architecture driven by Web Workers and WebAssembly, Next Karaoke provides ultra-low latency audio playback, sub-millisecond lyric synchronization, and responsive floating multi-window interfaces (WinBox).
The shortest path to singing
- 1
Open the player and allow sound.
- 2
Search for a song or drop a supported file onto the player.
- 3
Add the result to the queue, then press Play.
- 4
Use the bottom player controls to change key, tempo, volume, or open settings.
Key Features & Capabilities
WASM SoundFont Synth
Synthesizes 16-channel 44.1kHz audio in real time using SoundFont 2 (.sf2) instruments.
Multi-Window Desktop UX
Drag, resize, minimize, and pop out individual control modals as floating windows.
OPFS Local Storage
Stores gigabyte SoundFonts and 100,000+ song databases directly in Origin Private File System.
Phone Remote & WebSockets
Scan QR Code with smartphone to search songs, control playback, and adjust track volumes.