DEMO Ceres: Envelope Filter with 3 modes and full MIDI control

[jcpst]

Build Rating

5.00 star(s)

This all started with a wishlist post about the “The Noise”. I felt like a copycat effect was doable using the daisy seed. But along the way, I built a workflow where I tell AI what I want to do, compile and flash, try it out with my guitar and amp, and repeat. I realized I could make any digital effect I wanted to now, so I started with something I’ve wanted since I started doing DIY pedals.

Features

• 3 Modes: synth filter, wave fold, phaser
• All modes are envelope controlled with playing dynamics
• Expression control input to override the envelope follower.
• 128 presets accessible via MIDI PC 0-127
• CC control for LEVEL, SENS, FREQ, RES, EXP, MODE, and BYPASS

This is built on Funbox platform by @keyth72 . Using the existing planet effects as context, I created an AGENTS.md file and worked with Claude 4.6 inside of the Jetbrains CLion IDE. I added a build configuration that compiled and flashed in a single click, which made for a smooth workflow.

This took a lot of iteration. It was easy creating the basic functionality, but tweaking all the controls to “feel right” is where the real work was.

I ripped off the planets concept and named this after a dwarf planet.

For the build, I didn’t want to bother with wiring off-board controls, so I was limited on where I could layout the controls. I like offset layouts, which led me to this configuration. I used this LMS limited enclosure. I connected the LEDs backwards like a jackass at first, so this has been boxed twice.

I’m sure some people would think I’m full of crap if I didn’t record a demo. I’m not set up for making nice demos, but I think this is good enough for now.

 

[mckillacuddy]

This is badass. And rutting cat formants.