I'm nowhere near an expert like glt(what's a DCM anyway? )...the only thing I can say is that over toslink my PCM1793/CS8414 Firestone Spitfire DAC glitches up if it doesn't get SPOT-ON sample rates...and I read some ppl saying in the Musiland topic that before those "high precision" drivers came up, the "44.1" indicator on their DAC simply wouldn't light up.
This problem has been explained thoroughly here on glt's blog: http://hifiduino.blogspot.com/2010/01/how-are-clocks-generated-in-musiland.html
so I've had those real world experiments:
-a card w/ a 48Mhz PLL that played 48kHz fine, but going 48>44.1 right away would give very glitchy sound for a few secs. Waiting a few secs before going 48 > 44.1 would only make a brief glitch before each song...and it'd do the same glitch for each 44.1 song anyway.
-a card w/ a 18Mhz PLL that plays 44.1 fine but 48/96 always give a slight "pop" before each song..the built-in clocking prolly takes a few milliseconds to reach 48/96000,00 ?
-a card w/ 2 clocks(one for 44.1, one for 48), that would always glitch up on all frequencies.
It's pretty obvious that I need a card w/ spot-on sample rates..the Musiland in "high precision" mode look like good candidates.
if you check the end of this paper, m2tech explains that many cards don't output spot-on sample rates and that you might have never heard your music at the right pitch...hence you've been listening to slightly out of tune instruments: http://www.m2tech.biz/public/pdf/White%20Paper%20on%20hiFace.pdf
now I think my DAC only has this problem over toslink, so coax might not "glitch" up...I've got two friends running a Spitfire in coax and they don't get any glitch, but one of them runs an hiface
Originally Posted by ironmine
Does M-Audio Audiophile 192 have all the above?
The only thing I can say is that the Audiophile 24/96 PCI has 2 PLL's, and the USB version only one. the PCI is older I think(it's written in big on their PCB), not sure about the 192. But the musiland in "high precision" mode and the hiface seem hard to beat for spot-on sample rates.
Edited by leeperry - 5/29/10 at 11:51pm