Audiophile USB to PCM


I have an excellent upsampler and dac (dCS Purcell/Delius) and am looking for the very best USB to PCM conversion. So far, I've tried SlimDevices Squeezebox, and Xitel Pro Hi-Fi link.

Both are very good, but I was wondering if there are any other options I should be considering. Both the Sutherland USB Preamp and the Wavelength USB Dac convert to analog. I'd like something of similar quality that stops short of the digital to analog conversion so that I can let the dCS gear do that.

Any suggestions would be appreciated.

harry
128x128hbrandt
Is there a way to bypass the waveterminal piece? Does the Edirol UA-1D work just as well as the waveterminal for digital to digital conversion?

How does the Apogee mini-dac differ from the waveterminal for the digital to digtal conversion (since the Apogee has a USB in)? Which is better: waveterminal to mini-dac or USB directly to mini-dac?
Audioengr,

How is transit stock? Pretty good quality?
Why is the mod necessary and how do we do it?

Also, can you explain how to upsample in foobar or itune?

Do they do it automatically, or do we have to do something?

Thanks for the info

Steven N, (Audioengr) I am very interested in your modifications to the M-Audio board and the foobar solution. Please tell us more! :-)
I've used the M-Audio Sonica and switched to the Edirol b/c it sounded better to me... I've now switched to the Waveterminal U24 because it sounds better than the Edirol, and found out the reason may be b/c the Edirol outputs at 48 kHz, not native 44.1 kHz? Dunno if that is the reason or not. I have not compared the Waveterminal to Audioengr's modded Transits (the Sonica and Transit are pretty similar internally)--I gather the Transits do pass 44.1 kHz and respond well to mods. I and not really competent with a soldering iron, however, so I'll leave that to others...
With an Apogee Mini-dac, you just take a USB feed from your computer. No need for any gear in between.