AudioStretch for iPhone

I’m happy to report that AudioStretch for iOS is now available on the iOS App Store!

It’s a really handy tool for musicians learning music by ear, e.g. for slowing down guitar solos so you can more easily identify all the notes. If you’re a musician and you have an iPhone, give it a try. For a limited time, it’s available for free.

Version 1.0 is quite basic, but definitely usable. Lots more features coming in future versions!

Note that version 1.0 only works on iOS 6. It’ll let you install on iOS 5, but it’ll crash immediately on launch, due to a bone-headed bug that I introduced just before uploading the app to the store.  That bug is fixed in v 1.1 which should be on the app store within the next 10 days or so.  (Apple reviews all app before putting them on the store. The review itself is very quick, but the queue is quite long, hence the ~10-day delay).

I wasn’t even planning on blogging about v 1.0, but I’ve found that some other folks are already blogging about it; thought it’d be appropriate for the app’s creator to say something about it too!

Here’s what it looks like:

From the description on the App Store:

AudioStretch lets you change the playback speed of audio files without changing the pitch and/or change the pitch without changing the speed. Handy for learning music by ear, transcription, or just listening to your music library in a new way.

Unlike most audio time stretching apps, AudioStretch allows you to reduce the speed to zero, so you can “freeze” notes or chords, and can even play backwards at variable speed.

• Simple uncluttered user interface
• Use any song in your iPhone’s music library (*)
• Super-easy single-button looping feature
• Plays during fast-forward and rewind for quicker navigation
• Wide range of playback speeds: -200% to +200%
• Freeze notes or chords with 0% play speed

(*) Other than very old iTunes purchases that are protected with FairPlay DRM. Files beyond 1 hour in length will be truncated.

– This version crashes in iOS 5. Please ensure you’re using iOS 6 before installing AudioStretch 1.0, or wait for the next version.
– Requires iPhone 4 or better. You can probably install on an iPhone 3GS, but it’s unlikely to run well.


About Gerry Beauregard

I'm a Singapore-based Canadian software engineer, inventor, musician, and occasional triathlete. My current work and projects mainly involve audio technology for the web and iOS. I'm the author of AudioStretch, an audio time-stretching/pitch-shifting app for musicians. Past jobs have included writing speech recognition software for Apple, creating automatic video editing software for muvee, and designing ASICs for Nortel. I hold a Bachelor of Applied Science (Electrical Engineering) from Queen's University and a Master of Arts in Electroacoustic Music from Dartmouth College.
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