Originally Posted by Doublehelix
This comes from Fletcher's initial mini-review of the Aurora. Revelation is just passing on information he has heard about on the internet rather than from any real-life experience.
Yeah a industry standard $1,200 clock is not going to be better than a $1,800 8 channel Aurora A/D D/A with a clock thrown in. (SMILE) Hence I am not saying the Lynx clock is bad mind you.
" Any system that has to extract and regenerate a clock signal relies on some form of Phase Locked Loop (PLL). However, extracting a precise clock requires a rather inflexible PLL, unable to track widely varying source clock rates, while a more flexible PLL cannot exclude jitter artefacts very well.
Some systems try to overcome these inherent difficulties by using multiple stages of progressively more precise PLLs, but Apogee have taken a different approach with their latest clock technology, code-named C777. This is an entirely digital process (instead of the analogue or hybrid analogue/digital approaches more usually employed) which uses Direct Digital Synthesis (DDS) technology to generate the required clock frequency — allegedly with immeasurable jitter. When synchronised to an external reference clock, DSP-based adaptive digital filtering is used to condition the source clock, and the combination is claimed to provide the most effective jitter reduction available. In theory, even poor sources with excessive jitter can be used as a master clock, and the de-jittered signal can even be passed on to other equipment."(Sound on Sound Aug. 2005 review of the Big Ben.)
Big Ben also has a lock narrow and lock wide which aid in different situations, as well as a variable speed overide option.