Envion: a free, open, algorithmic drum composition environment in Pd

It all starts with the envelope, so that even a few milliseconds of sound can generate “thousands of sonic trajectories.” Built entirely in the free, open-source Pure Data, Envion is a deep compositional playground. You can think of it like an algorithmic drum machine. Emiliano Pennisi shares his creation with us.

How to get started with SoundThread and CDP: wild free sound tools

Composers Desktop Project has been producing secret sauce of sound spelunkers since the cooperative began in 1986. But it’s receiving newfound attention — partly because of the revelation Aphex Twin used it, but mostly because we finally get a usable GUI. Here’s your guide to how to install this on Mac, Windows, or Linux, and how to dive into the rabbit hole.

Peter Kirn - August 27, 2025

Free sample mashing with samplebrain, by Aphex Twin and Dave Griffiths

Designed by Aphex Twin, Samplebrain takes a new approach to samples – chopping up audio into a “brain” of little bits, networked by similarity. You can play it in real-time, free for all platforms, including Apple M1/M2.

Peter Kirn - September 25, 2022

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