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Author Topic: Learn me: Asynchronous and USB DACs  (Read 2696 times)

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anetode

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Re: Learn me: Asynchronous and USB DACs
« Reply #10 on: May 03, 2013, 12:51:05 AM »
As for ASRC, Benchmark has a FAQ-like white paper @ http://www.benchmarkmedia.com/discuss/feedback/newsletter/2010/05/1/jitter-reduction-using-pll-and-asrc-devices

Then of course there's the properly designed and implemented PLL, jitter's worst enemy.
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OJneg

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Re: Learn me: Asynchronous and USB DACs
« Reply #11 on: May 03, 2013, 02:10:29 AM »
Great thread (this one, that is). I finally feel like I understand it better myself.
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Solderdude

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Re: Learn me: Asynchronous and USB DACs
« Reply #12 on: May 03, 2013, 10:37:27 AM »
here is a good site with some (IMO accurate) info on it that is quite readable.

http://www.thewelltemperedcomputer.com/

Vincent is leaning a bit to 'the objective side' which may not be everyone's cup of tea... it is mine though.

Things that need to be in order:
power supply
PCB layout
Effective jitter reduction
DAC/upsampling chip(s)
analog filter/output stage

If all these are O.K. the sound will be as well.




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AstralStorm

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Re: Learn me: Asynchronous and USB DACs
« Reply #13 on: May 03, 2013, 06:34:43 PM »
One reason why I grabbed a Seasonic X series PSU and Asus P8B WS (almost server) mainboard.
Very stable clocks via USB, esp. USB 3, super clean power supply for those USB DACs.

Also why I supply the Leckerton from a very clean laboratory power supply (because I have one lying about) and actually not use its DAC, instead the SPDIF from a good semi-pro internal soundcard - said soundcard has an almost jitterless SPDIF clock, as measured by my frequency counter - it's slightly (0.0125% @ 48000 Hz) fast though.
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Re: Learn me: Asynchronous and USB DACs
« Reply #14 on: May 04, 2013, 12:27:08 AM »
Hmmm, so you can speed up the clock?  I wonder if that would make things sound hyper precise but unnatural.
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