This is our earlier priority interface. We offer this input for legacy products. This interface uses a completely proprietary electrical interface and has no resemblance to common I2S on the cabling. It provides clock feedback and a medium level of isolation between source and DAC.

Advantages:

-Synchronous to the DAC
-Some level of isolation between the DAC and the source
-Low Jitter

Limitations:

-Only a medium level of isolation between the DAC and the source
-Offers no control of the DAC from the host source (Volume, etc…)
-No error detection or correction