Can someone explain what is the purpose of this? As far as I can tell it only outputs a 10MHz clock, and in the example they provide they use it in between a cd transport and a DAC.... I can see the point in complex systems but here, wouldn't the DAC recover the clock from the spdif input anyways?
It is independent of the CD player and DAC, and can be connected to both the DAC and CD player via a BNC cable. However, I don't understand what the benefit of doing this is?
This external clock concept came from the broadcasting world, where there are so many conversion and processing equipment strewn all over the facility, if they are not synchronized to a master clock, their audio & video streams passing through so many different processing equipment could go out of sync. Example of master clock:-
https://evertz.com/products/5601MSC/ The 10MHz clock has been a long-standing industry standard for reference distribution.
Honestly, in my opinion, there is
no need for a master clock device for home HiFi system. Why? Because for stereo listening, we are mainly processing 1 stereo audio stream. There isn't another concurrent stream, or parallel device/equipment where we need to keep in sync. The internal clocks built into DACs these days are already of very high quality.
The
use case in the home HiFi setting that I personally came across whereby I would have needed an external master clock was when I was experimenting with 2 DACs, one for mains, one for subwoofer. A master clock is needed to keep both DACs in sync, otherwise there will be phasing issues caused by both DAC's clock drifting. I think I posted about this before somewhere, either in ASR, or maybe at the REW forum. I evaluated the master clock solution and concluded it was too expensive and complex, the most cost effective solution was to buy a 8-channel DAC, which I did - I bought the Topping DM7. Totally solved my 2xDAC clock drifting problem.
Hope this helps.
EDIT: found the
clock drifting post in ASR
/