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How Many Clocks Are Too Many?

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Posted on February 17, 2017 at 17:05:52
How many clocks are in your digital signal path?

Do you know?

I bet due to USB converters, reclockers and other gadgets people have way too many clocks in their system.

Ideally there should be only ONE!

 

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RE: How Many Clocks Are Too Many?, posted on February 18, 2017 at 05:50:45
PAR
Actually you need two in a practical implementation ( though not timing the circuit simultaneously) excepting for simple CD only systems. One to provide a frequency of 44.1 kHz and one 48.0 kHz.

The use of a single clock for a complex sequence of devices is not simple to implement. Most importantly it only works if the timing of the incoming source is running in relation to that single clock. This can be difficult to arrange with computerised audio where computers or network streamers/servers do not have a word clock in/out (the very expensive top of range Aurender W20 being the only exception known to me) and where the DAC may be isochronous.

 

RE: How Many Clocks Are Too Many?, posted on February 18, 2017 at 05:59:30
Yeah you're right.

To clarify I meant between the source and Dac chip.

 

Protocol, posted on February 18, 2017 at 06:19:55
Roseval
Audiophile

Posts: 1843
Joined: March 31, 2008
All you need is a clock as close to the dac chip as possible.
Feed is with an asynchronous protocol and all "outside" clocks don't matter at all.

The Well Tempered Computer

 

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