Another set of (untested) design files are up on GitHub, this time for a 4 channel class D amplifier. I have chosen ST chips to play with (TDA7498 or TDA7492 series).

Designed to plug into the output of the ADAU1966 DAC PCB.

Decided I wanted some snazzier names for projects, so have just gone with something basic, so the ADAU1966 dac will become DACOne, if I make an AK4490 DAC which I have been planning this would be DACTwo and so on. Not the most exciting thing in the universe but it seems functional

Have PCBs on order for AmpOne and CoreOne, say they are "in production" at the moment. Did try and get some free samples of parts from ST but they declined which I thought was a bit mean...

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So some new design files are up on GitHub. I have only just ordered these today so they are untested at the moment. I am sure there are plenty of errors I will find!

This will hopefully become a very useful microcontroller and DSP combination board. It is designed with SPDIF, I2S, USB, Ethernet, I2C, SPI interfaces, Not sure on the USB/Ethernet as the PCBs are not impedance controlled, although I have designed them to meet the impedance needed for USB and Ethernet traces. 

Assuming the PCBs work and talk with the XMOS dev tools there will be a lot of software work to do. Interesting times ahead....