Fully Featured Audio DSP Firmware for the Raspberry Pi Pico
Summary
DSPi firmware turns Raspberry Pi Pico boards into a feature-rich USB audio DSP with 10-band EQ per channel, volume leveller, loudness compensation, crossfeed, and matrix routing across multiple outputs. It supports RP2040 and RP2350, uses dual-core processing and a dedicated PDM subwoofer path, and includes a USB control protocol and preset system for production-grade audio work.