Midiverb1-2-midifex emulator

gentleclockdivider · March 21, 2026, 9:05pm

Pretty damn awesome
quote
This is an emulator for the original Midiverb, Midifex and Midiverb II effect units made by Alesis.

The core is DASP-family DSP processor µ-code emulator.

There’s a decompiler that outputs C code which makes it possible to run at full-speed which is exactly what is done for the VST-3 plugin.

unquote

ffx · March 22, 2026, 7:49am

Thanks, it’s an impressive work. Here are some macOS builds:

github.com/thement/midiverb_emulator

macOS build success (Sonoma, Xcode 15.3)

opened 12:29AM - 29 Dec 25 UTC

sirprancelot

Hi! Just wanted to report that I successfully built the VST3 on macOS Sonoma (1…4.7.1) using Xcode 15.3 (Apple Silicon). Build went through cleanly (only standard JUCE warnings), and the plugin loads and works correctly in Ableton Live as far as I can tell so far. Thanks for making this available - the reverbs sound great from early experimentation (literally just built). Seems respectably low CPU usage from quick trial and pretty smooth. I still want to delve more but on early play around I would have paid good money to have my hands on this! To date have been using Midiverb IRs and this seems to blow them away. Stumbled on this project and my timing must have been good. VST plugin 3 days ago. Thankyou to all involved! Past and present.