Developer Romain Dereu from Romagnetics contacted us to let us know that he’s released a major update for the Romagnetics FS-404, a MIDI companion to the Roland SP-404 MK2 that adds new capabilities and performance options.
Here’s what’s new in the Romagnetics FS-404 v2.0:
- Toggle mode: Based on the value of the last note sent (or the base note), toggle between Previous, Next, Repeat, Reset, and Kill Switch in either MIDI Mode A or B with or without looping.
- Base note: Adding a base note so you can assign all three commands as toggles.
Romagnetics FS-404 v2.0 Video Demo:
Here’s a video overview of the FS-404 and the new firmware:
Pricing and Availability:
The Romagnetics FS-404 is available now for $150 USD. Version 2.0 is a free update.
Dereu notes that all his projects are also open source hardware and firmware. The source for the FS-404 is available in Github.

Lol, love the duck on the Roland