[sdiy] MIDIVerb reverse engineering

[Jacob Watters]

Thank you. I have one of these that I need to repair. Just finding the
correct power supply has been a pia.

*Jacob Watters*
JacobWatters.com <http://jacobwatters.com/>


On Wed, Jul 16, 2025 at 3:37 PM Eric Brombaugh via Synth-diy <
synth-diy at synth-diy.org> 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:
>
> https://github.com/emeb/MIDIVerb_RE
>
> This repository includes schematics, presentation slides, source code
> for the disassembler, emulator and compiler, as well as SPICE and
> Verilog models of the logic. Anyone at all curious about how this
> product democratized the world of algorithmic reverb is invited to take
> a look - it's a fascinating glimpse into 1980's minimal TTL design and a
> testament to the genius of Alesis founder Keith Barr.
>
> Eric
>
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