1) multiplexed audio. Sure, your frame clock may only be 44.1khz, but the bit clock on a mere 8 channels of this will be 11.2896mhz, to say nothing of oversampl

1) multiplexed audio. Sure, your frame clock may only be 44.1khz, but the bit clock on a mere 8 channels of this will be 11.2896mhz, to say nothing of oversampling, to say nothing of processing 2) low latency processing of the above may require in-situ pipelining in which the pass-through buffer itself IS the processing buffer, etc. imagine being able to eat the pot you boil your pasta in. 3) why WOULDN'T any well-designed elegant system have every single tick as a function of that bit clock? It makes no sense to deliberately place spanners in your own path, particularly as pertains to jitter etc. It's not like you are going to pause your wavelet transform and check your email in process...