I did some digging and it looks like the CS8414 was the clock source in the 7510, so I'm guessing it's the same in the 7520/Caiman. So does anyone know if the clock features of the CS8414 could be bypassed and a higher end clock used instead? Also, if this was possible, how would this affect using various sample rates? Would you end up only being able to play 44.1Khz for example, depending on what clock frequency you purchaced? That's the bit about clock upgrades I've never understood.