Just thought I'd let the fellow Concero users know to be mindful of the quality of Signal you feed the Concero from a PC. I recently decide to try the "Fidelizer" software on my PC with great results. I already use JRiver with it's minor tweaks as well. I went into it honestly expecting zero difference, but figured it wouldn't hurt to try since it's free. It essentially kills non-essential windows services and reschedules processor priorities for audio. For me it very noticeably improved the overall sound quality. Slightly better separation, and more natural "flow" to the music. I really had no idea all the different windows processes and what not were gimping the signal going out so much.
It's not an absolutely night and day difference, so I'm not accused of being sensationalist, but I would say more noticeable than cable changes, and the difference between red book and hi-res. And certainly more noticeable than moving from foobar to JRiver. Probably just below an all out DAC upgrade to me. And it's not like a have a poorly specced computer, it's custom built for heavy gaming, but I guess there's just a lot of things going on in the background stealing resources from audio processes. It's almost frustrating to the logical, objective side of me...
I'm sure this would probably apply to any dac with USB but it just seemed more noticeable than I had expected and really pulls out what the Concero is capable of. This also would be more in line with Project86's review, since he uses a dedicated Auriliti music server, which I'm sure is already fully optimized for audio and sending the Concero an excellent USB signal. So much for the automatically assumed low jitter superiority of Asynchronous USB...