Fully Featured Audio DSP Firmware for the Raspberry Pi Pico

Post by WeebLabs » Mon, Apr 27, 2026, 8:00 PM UTC

skybrian wrote: post #58

WeebLabs wrote: post #48

Earlier quoted context omitted.

Thank you! I will soon be producing a comprehensive introductory video on YouTube, which should make things more accessible. There will also be an official plug-and-play custom board that includes all of the relevant IO, connectors and codecs.

Uh, some people like videos but I'd really rather have a web page with all the steps laid out and still photos. (And maybe links to the video, too?) A custom board sounds great, too.

Post by lysace » Mon, Apr 27, 2026, 8:44 PM UTC

Rohansi wrote: post #51

lysace wrote: post #32

Earlier quoted context omitted.

Default specs matter a lot for worldwide availability and affordability, as well as for the willingness of people to spend a lot of time creating free software for it.

520KB of SRAM is actually on the high end for microcontrollers. It doesn't seem like much but SRAM is on-die and significantly lower density than DRAM. For comparison, it's the same type of memory used for CPU caches, which are also small! You can easily find dev boards with 8MB of PSRAM online if you need it. Or you can buy the PSRAM and hook it up yourself. If you still need more memory than that then you're lookin…

Post by skybrian » Mon, Apr 27, 2026, 9:36 PM UTC

WeebLabs wrote: post #61

skybrian wrote: post #58

Earlier quoted context omitted.

Uh, some people like videos but I'd really rather have a web page with all the steps laid out and still photos. (And maybe links to the video, too?) A custom board sounds great, too.

There is a comprehensive readme on the repository but I will soon be adding a simplified "Getting Started" section.

Post by mattclarkdotnet » Mon, Apr 27, 2026, 9:58 PM UTC

Neywiny wrote: post #25

joenot443 wrote: post #17

This is awesome. What are the odds a Raspberry Pi could keep up with BTrack? https://github.com/adamstark/BTrack

Pi or pi pico? At first glance it looks like that software is designed for double precision floats. That would certainly be some compute. The M0+ doesn't have hardware floating point let alone double precision. The M33 on the newer chip I think has hardware single precision float so a simple find-replace should let it go. If it's not doing anything else and the sample rates aren't outrageous it might be doable but I'…

Post by Rohansi » Mon, Apr 27, 2026, 10:00 PM UTC

lysace wrote: post #63

Rohansi wrote: post #51

Earlier quoted context omitted.

520KB of SRAM is actually on the high end for microcontrollers. It doesn't seem like much but SRAM is on-die and significantly lower density than DRAM. For comparison, it's the same type of memory used for CPU caches, which are also small! You can easily find dev boards with 8MB of PSRAM online if you need it. Or you can buy the PSRAM and hook it up yourself. If you still need more memory than that then you're lookin…

I shouldn’t wish for more onboard RAM for the next Pico iteration because other boards already have more. Okay, dude.