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

3.1 out of 5
58 Ratings
58 Ratings

Great, but....

It’s been great to use this app for music practice. But now that I’m done practicing one set of songs and won’t be needing them anymore, there doesn’t seem to be a way to REMOVE songs from my list once I have opened them in the app! Can’t users just have a way of deleting files when they are no longer needed? If there’s a way, I can’t find it.

UPDATE: I FOUND THE WAY TO DELETE NO-LONGER-NEEDED FILES! I just hadn’t fiddled enough. After clicking on “Open” from the dashboard, you just have to click on a file in your list and a bunch of additional options besides Open come up. From there, you can “Delete file.”

I’ve added one star to my review. I still think it took me too long to figure out how to do this basic function of managing a list, but at least now the app does basically what I need it to do. I’ve had no problems at all with the quality of playback at any speed I choose (although I haven’t needed to go much beyond 20 or 30 percentage points slower or faster than normal). I simply need to slow music down so that I can practice my parts effectively until I’m up to speed. It has also come in handy to run it faster when I know the director is going to push us faster than the recording, or when I want to practice faster because I KNOW we won’t be playing it that fast — if I can play it faster, I can certainly play it at tempo!


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.


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. :)


Harald Meyer
24.3 MB
Requires iOS 7 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© (C) by 2012-2017
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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