GrainProc is a real-time granular synthesizer with which you can create new sounds and musical textures by affecting your voice, your instrument, or any input from AudioBus. 2 grain engines run in parallel, allowing you to layer two sounds and create rich textures, even as a solo performer!

• 2 Granular synthesizers running in parallel
• Waveform representation of the sound allowing you to touch where you want the sound source to be
• Sliders to control dry volume, wet volume, feedback level, and grain density
• Visual level monitors of the dry, wet and feedback levels
• Simple enough to be used with your feet! We discourage using your device with your feet, though it has been used that way for public performances!

What’s New

Version 5.0

- updated for all the new screen sizes, and updated to Audiobus 3

Ratings and Reviews

4.4 out of 5
11 Ratings

11 Ratings

OldDog Fu ,

Simple, Immediate, Gratifying

Just picked this back up after using other granular apps, and the simple interface, with immediate understandable interface feedback, was gratifying. Not a substitute for other granular tools, but well worth having in the toolkit.

zounds23 ,

A great app that needs a big red record button!

I love this app! Please add the ability to record/export with it. Please add this & it will be a 5 star app! If you have not tried this, and you dig experimental/ambient stuff, you owe it to yourself to give it a spin!

skiphunt ,

Likely needs an update

But, still cool. I’ve got a white block to the right of the blue page, and I’m not sure why it’s there. My install has never animated as it does in the demo videos. I’ve re-installed. No change.


Mayank Sanganeria
10 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

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

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