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.

Inertia completes an elegant trio of dynamic-shaping tools from Sinevibes

Many tools can add gates, filter frequencies, or add envelopes. But few do it with the elegance and ease of Sinevibes’ Switch, Array, and now Inertia. These plug-ins were early favorites from Sinevibes for their simplicity, but UI overhauls make them look and work beautifully — especially as you get to Inertia.

Peter Kirn - August 22, 2025

Close-up, angled view of Envy Machine, showing jacks, push-button selectors, LED indicators for modes, and tall, sleek encoders.

Envy Machine, 4 channels of envelopes, LFOs, randomness, knob recording

Ryk Modular sends us their latest, and it looks like a delicious combo of the stuff you often need, all in one. Envy Machine is a quad mod monster: four channels, each configurable as envelope, LFO, random voltage, and recordable knob voltage control.

Peter Kirn - December 5, 2024

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