Newbie Setup Question - Digital

Any recommendations on the Tri-Vista tube DAC vs. Bel Canto or Benchmark, specifically related to the jitters caused by the AE? Also, why would I need a Toslink cable? Pre-amp doesn't have digital inputs.

You need a toslink from the Airport Express to the DAC you intend to buy :-)

You need a really good DAC and a good music server device with a solid SPDIF/COAX output like a Squeezebox or Transporter. Alternatively, a specialized DAC with a perfected USB interface like one of the new Ayre or PS Audio units that are coming out soon, or perhaps one of the Wavelength DACs. Proper USB is sort of new.

You also need to meticulously rip your music to your drive using error correction software and lossless or preferably uncompressed formats like .wav or .aiff. Lossess is supposed to be as good as uncompressed but in my experience something gets lost in translation--possibly in the decoding process.

Will the computer be in the same room as the rest of the system?

If not, AE+Toslink to a DAC of your choice makes sense - provided you're happy with your remote interface. Apple remote can run on a laptop or i-phone and works well. The Sonos system is another good choice for distributing music with control (it has a great user interface), although $ can add up quickly and you'll probably still want an external DAC for critical listening.

If the server will be in the same room as the rest of the system, you might want to consider a USB DAC hard wired to your computer.

To your DAC question: I own a Benchmark and it's very, very good, but is on the lean but revealing side. In my system, it's a great match, but YMMV. I also use a DacMagic in a different application which is less expensive and might be a good choice for direct connection via USB, as it has such an input. It is on the rounder, warmer side of the spectrum and is IMHO a great value.

Good Luck

Marty

I would expect the software driver used with a particular USB device could make a difference in sound.

I 've heard others indicate that different USB cables make a difference as well, but I have difficulty understanding how different digital cables can make a difference.

I've never known USB or other common computer interface cables, when used within proper tolerances, to drop or alter bits in other applications. What makes audio special enough to hear a difference?

BTW I have no difficulty hearing differences in different analog cables (as opposed to digital) and understanding why these can sound different as well.