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Importance of computer for DAC shootout

I am using a perfectwave DAC + bridge + modwright 36.5 LS/PS preamp to stream flacs over my network. Very happy with the sound, but intrigued by the idea of getting better SQ for less $$$ I will soon be auditioning an Antelope Zodiac Gold + Volticus over USB, directly into my poweramp. Being able to take out the modwright alone would pay for the new DAC. My only concern is the Computer I will be using for this shootout. I have a Dell laptop and an Asus media PC, both with USB 1.0.

If I opt for the Zodiac I will go all out on computer source (may be mach2music), but I don't want to invest before knowing if I even want to go down the USB path.

In you estimation, is there any chance of the computer used in my shootout distorting the outcome? Would I be better off using my Marantz ud9004 S/PDIF source for the Zodiac, and then get a better computer if the Zodiac wins the contest?

Or are the difference between computer sources small and will I be able to conclude which is the better DAC using a mediocre PC as the source for the Zodiac. Any advise on how to set up the hardware for the shootout is welcome.
edorr
levy03
442 posts
 
i'm not a usb fan but won't open that can of worms in your thread. i recently compared a macbook pro to my win7 pc and found no difference what so ever (streaming with both). not sure if the mini has any advantages over the macbook so i can't comment on that. do agree with others that using an old pc is not a good idea.

comparing file types, i found flac and wav superior to aiff and alac. wav and flac were identical to my ears.
edorr OP
714 posts
 
I just got the Mac Mini at a price I can resell it for in a heartbeat so no exposure there. I will be using pure music with Flac's.
chadeffect
586 posts
 
As important would be to make sure the computer is on
a different power circuit to the rest of the hifi. Keep it isolated so
you don't add noise.
edorr OP
714 posts
 
I am using 2 PS audio P5 regenerators, which provide isolation. I would assume this should be OK.
mapman's avatar
mapman
22,299 posts
 
Have you considered using a network player like Squeezebox Touch as the source to the DAC?

That would effectively take the "computer" out of the sound making process. Squeezebox is designed for use with good audio gear. Most home computers including laptops are not.

You would connect the network player to teh network either using a wired or wireless network connection and then the player streams the music files over the network from the music server (ie your laptop running the media server program, say Squeezeserver in teh case of Logitech Squeeze players) as needed.

That is what I would recommend to take the computer out of teh music making process. I have used this configuration with everything from a 8 year old Dell laptop to much newer laptops as the server and do not hear any audible differences, although I would recommend a faster or more modern laptop with 4Gb of memory or more in order for server related operations like music library scans, searches, etc. to run faster.
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