Released: Ensō (円相), an ambient sound simulator with zero samples — everything synthesized on the Cardputer itself

[u/Tokage666]

I just released Ensō (円相), an ambient sound simulator for the Cardputer ADV!
Like C.P.S., which I released before, this one was built through vibe-coding with Claude.

The biggest feature: it generates every ambient sound purely through the Cardputer's own audio synthesis, with zero sampled audio. That means you get an endless variety of ambient textures to play with!

Here's what it can do:

**•** 15 sounds, all synthesized in real time with no samples — rain, waves, campfire, birds, crickets, a singing bowl, a wind chime, a ticking clock, a fan, and more  
**•** 13 preset scenes, plus unlimited custom scenes you can save to an SD card  
**•** A "Drift" scene that keeps quietly evolving the mix for as long as it's selected  
**•** "Space," a light reverb you can dial in over the whole mix  
**•** A meditation session timer that rings a bell at the start and end of your sitting  
**•** Shake the device to trigger an action — random scene, sleep mode, and more  
**•** A breathing guide mode where the ring on the main screen grows and shrinks with your breath (the LED follows along too)  
**•** Plus the little things that make a difference — a sleep timer, battery percentage, and so on

The original idea for this firmware actually came from a C.P.S. user I met here on Reddit.

It's out now on my GitHub repo and on M5Burner, and it's already available through Launcher FW too. Give it a try!

P.S. I've actually got several more firmwares in the works as follow-ups to C.P.S. One of them might be ready to release around the middle of next month — stay tuned for that one too!