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-   -   Better converting usb or spdif? (https://www.diyaudio.com/forums/pc-based/216356-converting-usb-spdif.html)

abraxalito 18th July 2012 06:11 AM

Not to mention less CPU work to do means less power drawn, less power means lower noise = better sound.

Dirk95100 18th July 2012 06:38 AM

The quality of a digital system is only dependant on the quality of the converters nothing else.

erin 18th July 2012 07:00 AM

Quote:

Originally Posted by Dirk95100 (https://www.diyaudio.com/forums/pc-based/216356-converting-usb-spdif-post3096240.html#post3096240)
The quality of a digital system is only dependant on the quality of the converters nothing else.

OK, if you say so.

abraxalito 18th July 2012 07:04 AM

Rejection of common-mode noise counts as a quality of a converter.

Dirk95100 18th July 2012 07:11 AM

Quote:

Originally Posted by abraxalito (https://www.diyaudio.com/forums/pc-based/216356-converting-usb-spdif-post3096264.html#post3096264)
Rejection of common-mode noise counts as a quality of a converter.

That only goes for the AD part of a digital system.
Because its the receiver that determines the CMRR.

abraxalito 18th July 2012 07:12 AM

I wasn't talking about CMRR, so no, it doesn't.

Dirk95100 18th July 2012 07:31 AM

Then what were you talking about?

abraxalito 18th July 2012 07:35 AM

My subject was a DAC with an unbalanced input (SPDIF). Do you think CMRR applies to unbalanced inputs? For a USB DAC, CMRR would only apply to the signal pair, but the grounds are where the problems are with digital systems.

I was talking about what I said - ability to reject CM noise is a desirable quality in a DAC. If you're not clear what CM noise is, Google can be your friend. Here's a link to get you started :

SoundStage! Pete's Place - JPS Labs Superconductor Interconnects: A Technical Discussion (09/1998)

RayCtech 18th July 2012 07:39 AM

Quote:

Originally Posted by Dirk95100 (https://www.diyaudio.com/forums/pc-based/216356-converting-usb-spdif-post3096240.html#post3096240)
The quality of a digital system is only dependant on the quality of the converters nothing else.

Are you sure :hypno2:

If it was as easy as that we all had been listening to music and not bothered to read or write any postings on forums like this :D

abraxalito 18th July 2012 07:42 AM

I'm fairly sure its down to the DAC, but there are qualities of DACs which don't get measured and specified in marketing materials. CM noise rejection is one such, but its nevertheless a crucial parameter. I've seen no DAC that has a measurement to date.


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