From the dCS Debussy user manual I have read that:
“So far, when using the PCM inputs, the system has been set up to lock to the clock generated by the source. This is the simplest arrangement, but it does not give the best sonic performance due to clock jitter.
If the source equipment can be locked to word clock or the USB interface is selected, the performance can be improved further by adding a Paganini Clock to the system as shown in the example below”
My question is why the external clock must also be connected to Debussy? If Debussy has been set up to lock to the clock generated by the source and we connect the external clock to the source. What does Debussy use the external clock signal for when it is connected to a source with the same external clock?