DSPi: A fully featured audio DSP firmware for the Raspberry Pi Pico (RP2040) and Pico 2 (RP2350)

DSPi Firmware DSPi transforms a Raspberry Pi Pico or other RP2040-based board into a very competent and inexpensive little digital audio processor. It acts as a USB sound card with an onboard DSP engine, allowing you to make use of essential tools like room correction, active crossovers, parametric EQ, time alignment, loudness compensation, and headphone crossfeed. It is my hope that the RP2040 and RP2350 will garner a reputation as the "swiss army knife of audio for less than a cup of coffee".

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Excerpt limited to ~120 words for fair-use compliance. The full article is at GitHub.