This PCB features a RP2350 that runs Weeb Lab's DSPi which takes in USB Audio from the host pc and allows user to create parametric EQs.
I added the correct caps and resistors to the outputs so that it can be connected to a output devices.
Therefore, I also splitted the SPDIF to a decoder that outputs I2S to a dac and 2 opamps to drive a line out or headphones.
Hold the boot button and download the Weeb Lab's DSPi firmware into it.
Launch the companion app and configure the eq.
At last, connect the device to the output of your choice.
BOM: Link to CSV
PCB Design
Schematics
