Pro logic is an Analog circuit. It's not DAC!(digital to analog conversion). The "digital soundfield processing" Yamaha uses(in addition to pro/logic) takes sound and "adds" digital delays and processing to the sound, not converting the whole thing to digital! It's an "additional process", not an entire transformation of analog to digital.
For a full explanation of how pro-logic works, I suggest a search on the net.
hope this helps
For a full explanation of how pro-logic works, I suggest a search on the net.
hope this helps