Project CD Box RS2T and reclocker

A present-day DAC should handle a signal via USB without problems. But why use that type of connector? I’d say that the onus is on the designer of a DAC having a USB input to make sure that the implementation is correct and jitter is not introduced into the circuitry.

@thyname 

Are you sure about this? On reclocking. USB yes, things like S/PDIF or Toslink, certainly not. 

You are all more aware of the technology of these units, but from the description of my ancient (but modded) Museatex Meilor Bitstream DAC first introduced in about 1992:

Museatex (Meitner) implemented the "C-Lock" circuitry back in those days to address poor jitter performance through the S/PDIF.

@jasonbourne71 : what’s your DAC by the way? The sound card in your computer?

jasonbourne71

370 posts

07-25-2023 at 01:21am 

A DAC is essentially a sound card. That’s all! Put it in a fancy machined-from-a-solid-billet case and you can charge $50K for the same parts as the $100 KTB DAC. Nobody will be able to tell the difference from, say, the real expensive Audio Note DAC! Because Hi-End DAC’s are a good example of confirmation bias!

@jetter : claiming to address jitter on the incoming S/PDIF is one thing and reclocking the signal is another, totally different.

The input receiver of that DAC and all present day DAC's re-clocks the incoming data. So no need for a clock between the transport and DAC. Jitter from the transport is a non-existent problem solved decades ago! 

"C-Lock" sounds like what Wavelength was using as the input receiver back around. the same time! The cable wasn’t the problem though. It was getting the transport and DAC to sync up. A major problem which before the asynchronous input receiver was handled by the IS2 circuitry/cable. IS2 is practically extinct these days!