Pleroma

Sparse
(no diffusion)

Switch position:
Left

Four independent 4×4 Hadamard feedback delay networks running in parallel. Individual reflections stay obvious, transients stay intact, and long decays develop an intentionally metallic character.

Intermediate
diffusion

Switch position:
Centre

Groups A and B couple into one wider network, C and D into another: two independent networks instead of four separate ones. Echo density increases, the tail smooths out, and stereo stays exceptionally wide while early reflections keep their direction.

Full
diffusion

Switch position:
Right

The same two pairs from Intermediate then couple into each other too: a Hadamard FDN of Hadamard FDNs, the Kronecker product of two 4×4 matrices rather than one flat 16×16 network. Early reflections stay directional before gradually diffusing into a smooth, dense tail. It's the closest this gets to a natural acoustic space.

Not a simple tone knob. It shapes three decay bands independently: full counter-clockwise is upholstered and heavily damped, full clockwise is bright and reflective, and the center adds a gentle midrange bloom.

In Intermediate and Full topology, diffusion tracks the distance between the two walls: effectively off under roughly 2m, ramping up to full strength around 8m. Sparse topology keeps diffusion off no matter how wide the gap gets, that's what makes it sparse. No separate diffusion knob to fuss with.

When the far wall sits closer than the near wall, Pleroma turns into a delay where the near wall sets the timing. Push the far wall a little past the near wall and that delay gradually smears as feedback increases.

Holds the current reverberant field indefinitely and mutes new input.

A perfectly static feedback network rarely sounds like the most alive one. Even subtle delay modulation suppresses static resonances while keeping the space's character intact. It's modelled after Lexicon 224-style excursion: triangle LFOs whose amplitude is itself modulated by low-passed sample-and-hold.

Near wall, far wall, decay, damping, mod rate, mod depth, and mix are all CV destinations, so Pleroma works equally well as a conventional reverb or a continuously morphing feedback instrument.

Pleroma demo (Caterina Barbieri — "Fantas") — by Feigur

Orbiting morphed genes — by Zelikovich Music

Pleroma Versio Demo — by Lo-fi Ambient Drones

Dreamy Eurorack sequence — by Lo-fi Ambient Drones

Bounded the startup fade counter so it cannot overflow after long uptime.

Eliminated almost all of the clipping and saturation that could occur on the Versio hardware, especially around louder or more energetic reverb states. Freeze now holds its level much more consistently too, and moving the Near Wall or Far Wall controls is better protected against sudden wet-level surges. Also includes finer Damping and Decay control, plus additional output protection for rare remaining peaks.

Pressing New Room now switches to the new space immediately instead of catching up over the next few milliseconds. Also some behind-the-scenes efficiency work, so Pleroma runs lighter on the hardware unit without any change to how it sounds.

Seeded the boot-time parameter smoothing so a freshly powered-on module settles immediately instead of surging through a runaway feedback transient before the tail can even start decaying. The residual gain-staging noise from v0.2 is gone too.

Fixed a wet-signal gain-staging issue at small room sizes, flagged by early testers within a day of launch.

First public release, shared on ModWiggler.