CleanStems Speed and Pitch Changer plays selected audio locally in your browser. It is made for practice listening: it changes playback in the page and does not export a permanently changed recording.
Choose Pitch-Preserving Mode for Learning Notes
When the preserve-pitch option is enabled, the browser attempts to keep the original musical key while changing speed. This is useful for learning a vocal melody, chord voicing or solo without shifting every note. Browser implementations can sound different, so listen for artifacts at extreme slow speeds.
Understand Tape-Style Playback
When pitch preservation is off, slower playback also lowers pitch and faster playback raises it, like changing tape speed. The tool displays an approximate semitone shift. This mode can be useful for effect exploration, but it is usually not the right mode for learning the original key.
A Practical Speed Ladder
- Load a permitted track and select pitch-preserving playback.
- Begin around 0.75x, or slower if the passage still breaks down.
- Combine it with the Audio Looper for a short passage.
- Raise speed in small steps after clean repetitions until you reach 1.00x.
Use a Metronome When the Problem Is Rhythm
If a slower recording still hides the beat, practise the rhythm alone with the Metronome. Returning to the recording after stable click practice often makes the passage easier to place musically.