2. pc-audio
  3. 1168589271

Help with PC Audio Quality vs. CD

I hope someone with real experience can help out with this. I am having a hard time getting the same quality sound from a PC that I get from a CD player. I recently built a HTPC running Windows MCE and ripped all my cd's using lossless compression. I'm using an M-Aduio Audiophile 192 sound card and run a coax digital out of the PC to an external DAC and to my amps. It just sounds flat to me, not that it's not clear sounding, but the bass is weaker, I can hear a harshness that's not there if I run any old CD player to the DAC through the same connection. Has anyone else experienced this? I keep reading in this forum that people are saying how much better the computer transport is in theory, but I have yet to witness it. I heard that the Windows KMixer is the problem. I tried ASIO and Kernal Streaming drivers that are supposed to bypass this, and it sounds clearer, but still not as 3-dimentional and "black background" as a CD player (and I mean ANY cheap CD player, I've tried 3!)

Can someone out there with an external DAC try this and let me know their results? Use a DVD player or anything with a digital out... I don't get it. My soundcard alone cost 3 times as much as the cheap DVD player I tried and it doesn't sound as good. Anyone experience this or have any suggestions?

Here's my system so you can understand the sound I'm looking for.

I have an external MSB Link DAC III Full Nelson that I've been using for years and I really like the sound of it. I've been using a couple Sony CD changers and running them to a MSB Digital Director that will automatically switch between digital inputs, out to the DAC, then to a tube pre and tube power amp (modded dynaco ST70) and out to a pair of Monitor Audio GR10's. This system (with the right tubes) sounds so sweet to me. I'm into the huge soundstage, crisp, smooth sound - melty mid-range... you know, the analog tube sound!

I have experience in recording studios and work professionally in computers, so I have a good understanding of both, so don't be afraid to get technical with me. Any help would be greatly appreciated!!

Ben
thesauce
bigamp
216 posts
 
I agree with Jax2. USB converter may improve your sound by reducing jitter. Audioengr's comments in the attached thread sum it up:

http://forum.audiogon.com/cgi-bin/fr.pl?icomp&1149558729&openusid&zzAudioengr&4&5#Audioengr
jax2
3,031 posts
 
Audioengr's comments in the attached thread sum it up:

There's some really helpful information on all aspects of PC Audio from Audioengr (Steve of Empirical Audio)in many of the threads he's contributed to. There's a good debate between Steve and Alex, of APL, on this thread. I haven't tried Steve's solutions, but they seem to be very highly regarded, as well as on the pricier side where that link/technology is concerned. Some may say, you get what you pay for. A good friend and fellow A'goner told me he heard a VERY impressive demo of Steve's new Pace Car reclocker at CES just recently. He was mightely impressed by the additional resolution it brought out from the digital files in the context of that demonstration. Anyone else hear that demo? I'd be curious to hear further comments. I'd be more curious to hear this stuff myself!

Marco
slothman
311 posts
 
Thesauce - you state you are running MCE. Are you untilizing that interface to access your music, or are you running Foobar or similar player that supports ASIO? What version of ASIO are you using? Soundcard drivers up to date?

Also, take a look at this thread specifically the comments made concerning S/PDIF connections.
pardales
652 posts
 
I'm no pro on this, but here is what I would try. Get an external USB to S/PDIF converter like the Hag USB. Use it to go between your computer and your DAC. I think that will help because -- I believe some of the problem you are experiencing might be with your soundcard.
thesauce OP
21 posts
 
Shadorne - Thanks for your responses, but I think there's more to it than that:

"You should avoid any D to A and A to D conversion. Clearly by sending things through your sound card then you are making a conversion somewhere in the PC. Clipping in an A to D might explain what you describe."

There is no A to D conversions... going sttraight out the SPDIF of the sound card to an external DAC.

"If you are not making a D to A and A to D conversion then the sound cannot change between a CD played in your PC or from a separate CD transport."

I used to beleive this, but it's not true, as you can read about the KMixer. I also beleive it goes beyond just the KMixer, since I've tried ASIO drivers that bypass it. Anything the computer does to process the sound affects it, even though you're in the dital realm.

"Another possibility is that their is a bug in your compression and de-compression steps that introduces losses."

I get the same results when running an uncompressed file (WAV).

Ben
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