I'm new to DAC's and digital curcuits as a whole,but I am wanting to experiment a little,I have this curcuit that has both coax and optical input,but I want a USB input,what modifications do I need to make this possible?
Usually a PCM270x/PCM290x USB interface chip would be used, ideally the I2S-out of the 2706/7 connected directly to the DAC chip, but many implementation I've seen use the SPDIF-out of PCM2704 for easy source switching or just simply due to laziness.
