TOPLAPapp 4+

Joshua Parmenter

Designed for iPhone

    • 4.8 • 4 Ratings
    • Free

iPhone Screenshots


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 sonic art: don't download unless you are open to stranger computer music sounds ((

What’s New

Version 1.2

This app has been updated by Apple to display the Apple Watch app icon.

64-bit builds for iOS 11 compatibility

Ratings and Reviews

4.8 out of 5
4 Ratings

4 Ratings

antfactor ,

Love at first glitch!

This is an improvisers dream/nightmare… And I love it because of that. As someone who has been producing and performing on various synthesizers since the mid-80s… This is one of those “machines“ that defies many norms simultaneously as it capitalizes on new ones. I hope this app and it’s associated website continue to be updated and stay relevant because I think it’s a gift in more ways than not, as well as a musical challenge. All instruments are challenging in different ways, but this one in ways that (for me) are far more appreciated than understood. I like the challenge, and I like the surprise. Many thanks to the developer!

Best Reviewer Ever ,

Please update!!

I just recently discovered this app and love it. I would love a little more explanation on what each letter and box represent to be able to predict the sounds a little better for performing. Maybe even an effects section to further mangle the sound. I know chances are slim that this or RISCy will get updated but you would be doing a great service to the noise genre by giving this a refresh.

dkamionk ,

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.

App Privacy

The developer, Joshua Parmenter, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

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