Before you buy AudioStretch, consider first downloading AudioStretch Lite for FREE. Apart from some feature limitations, it's the same as the full (paid) version. The Lite version is a great way to see whether AudioStretch works well for you.

As a musician one of the most helpful tools you can have is the ability to slow-down, loop or auto-transpose the notes for a piece of music you are trying to learn.

AudioStretch is the world’s first audio and video transcription tool.
Now you can manipulate the pitch, speed and transcribe your tunes from both audio and video files; or by using your phone’s camera you can capture video directly into AudioStretch and transcribe it!

• Import audio or video files
• Capture video with your phone camera for transcription
• Change the speed of files without changing the pitch
• Listen to the individual notes as you drag the waveform
• Play audio and video at zero speed
• Transpose any music
• Loop difficult to learn sections

With AudioStretch you get all of this in an incredibly responsive and easy-to-use app. Ideal for transcription, learning songs by ear, crazy sonic experimentation, or just listening to your music library in a new way.

• Load songs from your Music Library. (Note: songs from Apple Music have DRM and therefore cannot be loaded).
• Document Picker import/export option supports iCloud, OneDrive, and more
• Open Dropbox files and email attachments via "Open In"
• LiveScrub™ : listen as you drag/hold the waveform
• Speed range -10x to 10x, including zero speed!
• Instant freeze to zero speed by double-tapping on speed display
• Pitch shift range +/- 36 semitones
• Keyboard/spectrum feature for transcription
• Super-fine speed/pitch adjustment via drag left-right on speed/pitch display
• Flexible looping feature
• Audiobus support: stream live audio directly to other Audiobus-compatible apps!
• No ads or in-app purchases

If you run into any problems with AudioStretch or AudioStretch Lite, please contact

What’s New

Version 6.5.0

Features and improvements:
• Added support for Audiobus 3.0
• You can now choose to optionally show DRM protected content when browsing the music library

• Fixed an issue that occasionally crashed the app when importing certain video files

Ratings and Reviews

4.8 out of 5
6 Ratings
6 Ratings
hallamonger ,

Great app

I love this app. I really hope it will be maintained because it is very useful and easy to use. I have used the classic Amazing Slow Downer on my desktop and laptops for years but I think AudioStretch is even better in some ways. I love the capacity to manually scroll through the waveform via touchscreen; this reminds me of cueing tracks on an LP record and works better for me at times than just having an auto play loop on repeat.

Developer Response ,

Hi hallamonger - We appreciate the kind words. Thank you for all the love! AudioStretch is still being maintained and worked upon! Cheers!

TablaSadhu ,

Really useful!

So useful for transcribing and practising difficult parts, as well as shifting pitch for different instruments.

Only complaint would be it would be good to have a recent or favourites list to access frequently used tracks quickly.

Developer Response ,

Hi TablaSadhu - Thanks for the stars! We'll forward your request for a ‘favourites’ or ‘recent files’ button to the Product Team for future consideration. Email with comments or questions, anytime!

Mark Hansen Music ,


Excellent App for time and pitch stretching plus so many other useful features.

Developer Response ,

Thanks Mark!


Cognosonic Pte Ltd
19.5 MB

Requires iOS 9.3 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating
Rated 4+
© 2019 Cognosonic Pte Ltd


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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