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sonic.org.uk

An instrument of resonance, not of notes.

Eight resonators trade energy through a delay network and lose a little on every pass. Your hands decide where it collects.

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What it is

Free

Free, and no part of it is a trial.

Nothing stored

Close the tab and the state is gone. Stereo out of any speakers; nine channels for your DAW, if you route them there.

Open

The source is open, and the schematic is published on release day, not on request.

See exactly how it works

No claim here that isn't in the code. The signal diagram, the filter topology, the coupling maths and the four prime delay lengths, all published, not withheld.

Read the schematic

Why it's built this way

An essay on what an instrument owes the person playing it, why the geometry has to produce the numbers, and why nothing here is kept.

Read the essay

The six controls

Essence

How hard each resonator is driven towards singing on its own.

Origin

The fundamental everything else is derived from.

Element

What the resonators appear to be made of.

Harmonic

How the eight are spaced against the fundamental.

Form

The shape the sound takes in time.

Gestalt

How much the eight behave as one body. It changes what the other five mean.

The refusals

Routing

Stereo is the default: it plays on any speakers or headphones, no setup required. The nine-channel DAW bus is there when you want it, one click away, and it needs a virtual multi-channel driver you install โ€” this says so plainly rather than pretend it is one click.

Bus
stereo by default; 1โ€“9 dry-plus-shaped, opt in
Device
a virtual audio device: BlackHole, VB-CABLE, PipeWire, JACK
Clock
WebMIDI, either direction
Disk
a WAV streamed straight to a file you chose

It takes about an hour before you stop fighting it. That hour is the instrument.

Open the instrument