No design changes were made; the project remains empty.

Before implementation, one technical issue needs resolution: the PCM2706 is a USB audio DAC and does not provide a standard I²C control interface. The intended “3 GPIO and ground” connection must be defined—possibly HID/status GPIO signals, an I²S-style interface, or simply a four-pin interconnect. The two USB-C ports would otherwise be independently assigned to the RP2040 and PCM2706, with proper CC resistors, ESD protection, power handling, clocks, and decoupling.

Execution stopped because your ACUs ran out.