In the new issue of Tape Op, Bob Katz of Digital Domain states that "99 times out of 100, the INTERNAL clock in a converter will produce lower jitter and thus better sound than if you clock that converter externally from the most stable wordclock generator in the world! The reason: A crystal oscillator is much stabler than a phase locked loop. And when you force a converter to slave, you are replacing its internal crystal with a much less stable phased lock loop....The only exception would be a converter whose internal oscillator is so poorly designed that it is not as stable as its PLL." (Quoted from Tape Op) I'm trying to reconcile the above with various authoritative-sounding postings and comments (some of them by those who sell external clocks, some by those who use them) that purport to describe how much an external clock like the Lucid improves the sound of even non-bargain basement converters. Any one care to weigh in? I'm not talking about WC distribution to multiple places. I'm simply talking about any sonic advantage gained from external clocking vs. a converter's "built-in" clocking.