[sdiy] MIDIVerb reverse engineering

[Gordonjcp]

On Wed, Jul 16, 2025 at 12:35:35PM -0700, Eric Brombaugh via Synth-diy wrote:
> Back in 2021 Paul Schreiber and I reverse engineered the MIDIVerb I and
> although Paul posted a number of Youtube videos to discuss what we'd
> learned, we decided at that time to keep the design materials we'd generated
> from that effort private. Now that Paul is no longer with us I've
> open-sourced the materials on Github:

Based on the circuit diagrams from the videos, some discussions on here and on Reddit, and a bit of experimentation, I came up with this:

https://github.com/ErroneousBosh/BarrVerb

It downsamples to 24kHz pretty stupidly, so it only "plays properly" for 48kHz samples.

If I could find a working MIDIFex ROM I expect it could be cooked into a format suitable for this, too.

-- 
Gordonjcp