Sa9123l Driver Access
Independent measurements (from e.g., L7Audiolab ) show the SA9123L’s onboard clock recovery has over USB. That’s fine for $50 DACs, but audible? Probably not. However, an XMOS chip with external Crystek clocks can get down to 50 ps. For critical listening, use the SA9123L in asynchronous mode with a good external oscillator on the DAC side.