Change your music's tempo 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 changes to an audio file.
Use cases of Music Speed Changer are for instance: practicing guitar and other music instruments, transcriptions, change the speed of audiobooks...

- Change pitch and tempo (speed, time-stretch) independently
- Loop region
- Select region
- Filtering
- Import various formats including mp3, wav, m4a, ogg, aac, ...
- Export to wav and mp3

** Note **
Music files should be located in your MacOS "Music" document folder for best user experience. Files which are located outside this folder can lead to "File open" errors.

What’s New

Version 1.56

Bug fixes.

Ratings and Reviews

sideofme_mweber ,

Infinite Crash loop

Worked fine for about 3 different songs. Uploaded a 4th wav file and the whole app got into a crash loop. And guess what, there is no way around it. You can clear the cache, delete and reinstall the file and your still hosed. Waste of money and time. Don't bother. Shameful coding and QA.

Quality App! ,

Works Great for me!

This app does exactly what it says it will and it was very affordable. Thank you for sharing an app for adjusting the tempo and pitch of music. Works wonders if you’re into cinema :)

rotrier ,

Crashing in infinity!

I haven’t had a chance to try the app because when it launch, it kept crashing and crashing and crashing and crashing. Where’s the refund button? Oh, I kept forgetting, this is Apple App Store, not Google Play.


Harald Meyer
16.3 MB

OS X 10.10 or later, 64-bit processor



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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