The Music Speed Changer app allows you to easily change the playback speed and the pitch (key) of audio in real-time and independently from each other. The app also supports video (with zooming), subtitles (e.g. for karaoke), images (e.g. for scores), and text.

Full version:

++ If you experience stops during playback then increase the buffer size in the app's settings. ++

## Features Lite ##
- Change pitch and tempo (speed, time-stretch) independently and in realtime using time and frequency domain algorithms.
- Create range and position markers.
- Volume amplification, and simple voice reduction.
- Channel selection (left/right).
- Record audio directly in the app.
- Import various formats including mp3, wav, m4a, ogg, aac, mp4 video,...
- Import audio from: media gallery, iOS "Open in" (supported by many apps, including DropBox), iTunes File Sharing (USB), and Wifi upload.

## Features Pro ##
- Loop and select regions.
- Export/share and import songs with annotations (for instance for for sharing between music teachers and students).
- Playlists.
- Video view* with zoom support (for instance to get an exact view on a guitar player's hand).
- Text view with auto scrolling and monospace font support (e.g. useful for tabs).
- Subtitles view to show subtitles (for instance for karaoke).
- Image view with zoom support (for instance for displaying scores in image format).
- Export modified audio to wav, mp3, m4a, and flac.
- Batch conversion of files.
- Frequency conversion (for instance to 432Hz).

* An iPhone 6 or better is recommend for the best video experience. The recommended video resolution is 720p.

Use cases: music instrument training by adjusting tempo and pitch to anytune, transcription, karaoke, ...

What’s New

Version 1.06

Bug fixes.

Ratings and Reviews

2.3 out of 5
19 Ratings

19 Ratings

gslacvslsvsksvvdl ,

You’re lucky if you can get through one song

I use this to change the pitch and speed of songs. But it keeps pausing right in the middle of it. The song will only play for a couple seconds at a time before it randomly pauses.

Jalen Cloud ,

Needs more things

I love the app and use it all the time, but I wish it could just get a little upgrade and add more stuff to it. It should give us users the same amount of stuff that the Pro version has but don’t give us A LOT. Just make the app more customizable and make changing the sound and Tempo and all that even better~~~~❤️

ghghghyue ,


This app saved my life. I wanted a pitch changer app and I was wandering through App Store and couldn’t find any good ones. None of the others gave me the option to export the songs after changing the pitch. This is perfect. Thank you!

App Privacy

The developer, Harald Meyer, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

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