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Better converting usb or spdif?
Better converting usb or spdif?
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Old 18th July 2012, 06:11 AM   #11
abraxalito is offline abraxalito  United Kingdom
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Not to mention less CPU work to do means less power drawn, less power means lower noise = better sound.
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Old 18th July 2012, 06:38 AM   #12
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The quality of a digital system is only dependant on the quality of the converters nothing else.
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Old 18th July 2012, 07:00 AM   #13
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The quality of a digital system is only dependant on the quality of the converters nothing else.
OK, if you say so.
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Old 18th July 2012, 07:04 AM   #14
abraxalito is offline abraxalito  United Kingdom
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Rejection of common-mode noise counts as a quality of a converter.
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Old 18th July 2012, 07:11 AM   #15
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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.
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Old 18th July 2012, 07:12 AM   #16
abraxalito is offline abraxalito  United Kingdom
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I wasn't talking about CMRR, so no, it doesn't.
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Old 18th July 2012, 07:31 AM   #17
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Then what were you talking about?
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Old 18th July 2012, 07:35 AM   #18
abraxalito is offline abraxalito  United Kingdom
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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)
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Old 18th July 2012, 07:39 AM   #19
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The quality of a digital system is only dependant on the quality of the converters nothing else.
Are you sure

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
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Old 18th July 2012, 07:42 AM   #20
abraxalito is offline abraxalito  United Kingdom
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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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