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.

Note: This is the LITE edition of AudioStretch, which has a few feature limitations. To get all the features, without the limitations, consider buying the Full version.


• Max song duration 3 minutes (full version 3 hours)
• Speed range from -1.5x to 1.5x (full version -10x to +10x)
• Pitch shift +/- 3 semitones (full version +/- 36 semitones)


• Load songs from your Music Library
• 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
• Instant freeze to zero speed by double-tapping on speed display
• 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 6.6.0

Fix for a bug that caused issues with importing tracks from the Apple Music library.

Ratings and Reviews

3.0 out of 5
5 Ratings

5 Ratings

imhosue ,

Duped I think

Well liked it until it said I will not play any track for more than three minutes. You have to pay for an upgrade if you want to play a whole track. I feel duped.

Developer Response ,

Hey Imhosue - We're sorry for the frustration. The limitations of the Lite version are listed under the descriptions in the App Store. Do let us know if you decide to use AudioStretch again!

MichaelWiseman ,

Dismal first experience

I downloaded this app and the first audio I tried it on caused the sound to switch off totally, not just for this but for all apps. Required avisit to Settings to fix it. Not a good look!
The audio was an AIFF file on an iPhone 6s.

Developer Response ,

Hi xycyz2 - That sounds awful. We'd love to help you figure out what's wrong. Was there any error message when you imported the file?

Cindy T.T.N ,


Great work ! I love it !& Thank you , wish you have nice day ! Love from Cindy.

Developer Response ,

Thanks Cindy!


Cognosonic Pte Ltd
21.9 MB

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



Age Rating


  • Family Sharing

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

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