the PCM2707C from Texas Instruments which takes care of the USB communication and outputs I2S audio data the PCM1794A, a 132dB SNR 24-bit 192kHz DAC which receives I2S protocol the OPA4134 ...
The application, as written, is build for an ES9023 DAC, but basically anything that speaks I2S should be workable with only a little bit of datasheet-poking and head-scratching. Of course ...