That is definitely a valid path for expansion, price/performance ratio of these chips is indeed incredible... so chaining them makes a lot of sense for a larger hardware project.Just a suggestion to you both - wire in two RP235xs linked by PIO I2S or TDM and an SPI bus. No matter how much you optimise the code, eventually you'll need more processing power to implement more features. Oscillators and envelopes in the first MCU and filters and effects in the second.
And this MCU only costs about the same as a few op-amps
Good luck !
However, for this specific project, my main goal is to keep it accessible as a "single-chip solution" that anyone can just flash onto a standard Pico board without needing custom PCBs or wiring up multi-mcu communication.
There is something very satisfying about squeezing as much as possible out of a single microcontroller.
But who knows, maybe a multi pi solution is a future project.
Thanks.
Statistics: Posted by Naiw — Tue Jan 06, 2026 7:11 pm