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By Nicholas Collins

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TOPLAPapp is a sonic puzzle based around a virtual machine for sound synthesis. This machine accepts a few valid instructions represented by the letters T, O, P, L, A, and p, and you control it by placing each command letter within a grid, along with setting some associated parameter sliders. The machine rushes through the instruction set to create output sounds, which are usually of a somewhat noisy character, hopefully interestingly so. The historical antecedents include instruction synthesis as pioneered at the Institute of Sonology in the 1970s, and the live coding movement, of modifying a running program as it acts. This app is intended for those interested in more experimental sound art: don't download unless you are open to stranger computer music sounds ((

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Customer Reviews

Highly engaging!

Probably not for everyone, but definitely great for me. Great for exploring alternative sound aesthetics and being blind to the actual parameters you are controlling is a great exercise in letting your ears do the work unfettered by cerebral filters.

Thanks to this app, I now know about the fascinating world of livecoding. Thanks for this great new toy/tool.


Frustratingly, deliciously cryptic...would be nice to have an "expert" mode where you could actually see the controls...and perhaps have a way to adjust pitch. I think of this thing as a buchla skeletoid nectarine blastocyst with social adjustment issues. about a synth app along these lines with bizarre editing controls?

really love it

along with the other app by this developer, this is an amazing creative use of strange sound synthesis, and its being free only makes it twenty times better. thanks so much for this! its like circuit bending on the iphone, no clue what im doing but it sounds greattt!!!!!!!!!!

View In iTunes
  • Free
  • Category: Music
  • Released: Jul 28, 2009
  • Version: 1.0
  • Size: 0.1 MB
  • Language: English
  • Seller: Nicholas Collins

Compatibility: Requires iOS 2.0 or later. Compatible with iPhone, iPad, iPod touch (2nd generation), iPod touch (3rd generation), iPod touch (4th generation), and iPod touch (5th generation).

Customer Ratings

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