Motion Design · Oct 7, 2026

Inspired by all the custom firmwares popping up lately, I built my own and turned the synth into an RPG: FM1 Quest

Inspired by all the custom firmwares popping up… by hericdk, credited to Claude Opus 5.5. Watch the Motion Design video and visit the original Reddit post.

hericdku/hericdk
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Opus 5.5
61 net upvotes on Reddit, checked Oct 7, 2026
From the creator’s post · hericdk on Reddit
Haha, sorry in advance for the excitement! It might sound like a joke, but this thing is actually running buttery smooth on my FM1. I just pushed the deployment to GitHub and ran my first test, and I’m still blown away that everything is actually working!! Obviously, this is just an early concept/beta prototype, so I haven't done anything *too* crazy yet. I based it on **SLOOP** and used **sloop-web-emu** for testing before flashing... (thanks u/sabliran93) But this project is already giving me so many ideas on how to push this synth way beyond what it was originally designed to do. In terms of new functionality, I didn't add anything extra yet. Overall, what my code does is swap in a series of sprites that re-skin the entire SLOOP interface into something much more visual: * **Each track represents a different character.** * If I solo a track, I enter a battle/duel with a secret enemy. * If I record a track, I have to fight a boss. * If I edit a sound, it opens…
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Video and prompt by hericdk. Original post ↗

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