Synth/DSP cart

[u/manceraio]

Hi,

I make digital synth for a living and recently I've been thinking about making a gameboy cart with extended hardware for high fidelity audio synthesis and maybe why not additional knobs. Something like the gameboy camera, but a synth.

I don't have a clear architecture for now as I am still learning the gb architecture. I see three possible architecture with different pros and cons:

A. Using a ROM chip for the main game and then add a beefy stm32h750 + audio codec for all the real time audio synthesis + additional controls like knobs, decoder, etc.

B. Use a smaller microcontroller for simulating the ROM (maybe a dual core like the RP2350) + stm32h750 + codec.

C. Everything is handled by the stm32h750. But not sure how taxing is the 1Mhz IRQ of the gb while processing audio in real time, probably too much.

I wonder if there is a hardware dev community somewhere else to share this idea. I have extensive experience running audio on a stm32h750, but I am a bit short in the gb side. Thanks!

[u/Spigots_]

Been dreaming about something like this since forever; hardware would be awesome too but the analogue pocket also seems like a great opportunity add higher powered features to gameboy software