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 speed and pitch on the fly.
It is also possible to export the changed audio file.
Use cases of Audio Speed Changer are for instance: practicing guitar and other music instruments, transcriptions, change the speed of audiobooks...

This version is optimized for the iPad. iPad 2 or newer are highly recommended due to low resources of the iPad 1st generation.

- 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*
- Volume amplification*
- Voice reduction*
- Separate playing of left/right channels *
- Import from Dropbox *NEW*
- Send files by email* *NEW*

* Advanced version's features

APS Player:

- Extreme pitch and tempo changes (for instance 24 semi-tones, which is quite a lot!) can lead to noise.
- Voice reduction quality depends on the input. It works best with little compressed music and assumes that voice was recorded in mono and later mixed into the stereo channels (which is the case for a lot of music recordings)

What’s New

Version 1.89

Bug fixes

Ratings and Reviews

3.0 out of 5
95 Ratings

95 Ratings

RosieBug15 ,

Great app but I'm upset about something...

There's no email option, and I have wasted around a whole week trying to figure out how to enable file sharing, and where to find it. I still haven't figured it out and I'm very angry and upset and I think there should be an update containing the option to Email creations. Please, do this ASAP. Don't change anything else because then you might make the app too complicated and I've been looking for a simple app like this for a very long time.

Please read my review and consider making it easier for some of us to save our creations, not everyone is computer-smart, you know. :)

fordjc ,

Best sound quality for slow down

I was just using this app and it was good for slowing down the tracks to hear better what is going. But slowing down a track digitally usually makes it sounds so badly that you can barely stand it. But then I discovered a setting for HQ or high quality. When you turn it on, it clears up most of the digital artifacts present when you slow music down. Even at 50% speed the music still sounds decent. Way to go app developers! No other product that I have used can do this. Also, the ability to take either track to mono can help isolate the instrument you are trying to transcribe. And finally, the button to remove vocal can also work to cancel the bass, since it is also mixed to the middle. This is great for bass players as a play-a-long where you become the bass player on the recording. Both these features need a stereo track to be effective.

ammaie ,

Cant send file

this app has amazing quality sound, but whenever i try to send the new file i created with the app it just sends the original file. it also stops playing the music when i turn off my phone, which isnt so much of a big deal. please make it so you can send the files you create with the app.


Harald Meyer
24.3 MB

Requires iOS 7 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
In-App Purchases
  1. Audio Speed Changer Advanced Features $2.99


  • Family Sharing

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

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