What it does
Adds a CDJ-style tempo control panel to music purchase sites. Designed for DJs who want to preview tracks at a target BPM before buying.
- Vertical TEMPO fader with ±6 / ±10 / ±16 / WIDE range, like a real CDJ
- MASTER TEMPO (pitch keep) using DAW-grade Rubber Band Library
- BPM display with automatic extraction on Beatport / Traxsource, or tap input
- Keyboard shortcuts (,/., R, M, T) and mouse wheel
- Draggable panel with position memory
Supported sites
- Bandcamp — bandcamp.com
- Beatport — beatport.com
- Traxsource — traxsource.com
- Plus any site you add via the popup
Privacy
No data is collected, tracked, or transmitted. All audio processing happens locally in your browser. See the Privacy Policy for details.
License
Source code is open at github.com/XTAL-JP/tempo-slider under GPL-2.0 (required by the bundled Rubber Band Library).