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Music Speed Changer Pro Screenshot 0
Music Speed Changer Pro Screenshot 1
Music Speed Changer Pro Screenshot 2
Music Speed Changer Pro Screenshot 3

About Music Speed Changer Pro

Music Speed Changer changes audio tempo (speed) and pitch in realtime quick and easy. Just select an audio file, mark the region you want to play (and loop/repeat) and change tempo and pitch on the fly.
It is also possible to export the changed audio file for playback in other players.
Use cases of Music Speed Changer are for instance: practicing guitar and other music instruments, transcriptions, change the speed of audiobooks, language learning...

- Change pitch and tempo (speed, time-stretch) independently.
- Support for arbitrary pitch (even deviating from semi-tones)
- Loop region
- Select region
- Filtering
- Import various formats including mp3, wav, m4a, ogg, aac, ...
- Export to wav and mp3
- Volume amplification
- Play left/right channels separately (e.g. for duet training)
- Voice/Vocals reduction: reduce vocals so that only music is audible (does not work with all audio recordings!)

Note: Extreme pitch and tempo changes (for instance 24 semi-tones, which is quite a lot!) can lead to noise.

Questions, ideas, feedback? Contact us here:

Had this app for years now and its just the best. Does everything it says it can do.
General Guntra
great way to learn how to play songs on whatever instrument. So easy to set loop points, change tempo, and learn every note of a specific part of a song.
A decent app that does as professed. I have three pro versions: iPod, Kindle, Galaxy. Mostly I use the speed adjustment to slow down riffs. I also accelerate rhythm tracks when I nail the riff. Pitch is help...
k9sound video