Speed audio up or slow it down from half speed to double, without changing the pitch: a podcast at 1.5×, a solo slowed down to learn it, a backing track nudged to a new tempo. It runs on your device; nothing is uploaded.
How it works
- Drop a song, a backing track or a voice recording.
- Set the semitones (−12 to +12) and the speed (0.5× to 2×), and listen.
- Download the result as MP3 or WAV.
Questions
- Does my file get uploaded?
- No. The models and all processing run inside your browser on your own device. You can verify this yourself: open your browser’s DevTools, watch the Network tab, and process a file: there are no uploads. After the first visit most tools also work fully offline.
- Does it sound natural?
- Small changes, a semitone or two, or 10–20% of speed, are hard to tell from the original. Big ones are audible on voices, which start to sound processed past five or six semitones; instruments hold up better than voices.
- Can I change the pitch and the speed together?
- Yes. They are independent settings: transpose a backing track into your key and slow it down to practise, in one pass.