PC audio with USB DAC

Every USB interface and USB DAC is different. Different performance, different drivers etc..

It is important to understand the type of USB interface and the optimum playback software and computer hardware to use with it.

Here are some tips:

http://www.empiricalaudio.com/computer-audio/

Steve N.
Empirical Audio

You reference to needing to install drivers for the DAC suggests that you are using Windows, not a Mac. Let us know if that is not correct. You need a Windows person to tell you how to best adjust your sound settings, I think. You shouldnt' be having hissing and popping, and you should be able to redirect the alerts to the computer's speakers. Unfortunately, I don't use Windows anymore, so I can't be of much use.

I have a pair of Audioengine 2's attached directly to my iMac. I don't use them for music listening, but my only real complaint is that they are very sensitive to RF interference... so I can't set my cell phone near them.

If you're concerned about file quality, find an ABX tester app, down convert some flac files to AAC at a few different bit-rates and see at what point you can start telling the difference.

I haven't had any issues with my Macbook Air interfacing with my USB DAC (Music Hall DAC15.2), so I can't be of any help on that topic other than to say that the 15.2 packs a lot of bang for under $300.

Thanks for the input everyone. I love to see a vibrant community with passion for music and practical experience on how to get there.

I should have mentioned my system type
Thinkpad W520 (Quad Core CPU), 8GB RAM, Win 7 SP1.
This is a traveling laptop, so not dedicated to any one thing.

I am currently using iTunes but am evaluating Jriver Media Center 17 (and am pissed that it is screwing with my library--and placing a hundred songs into "unassigned" artist. I just got to where I understand how itunes does it, but I digress...

Using internal 500GB hard drive for golden master of library. Have a NAS with a mirror image for streaming to the rest of the house. I may allow that NAS copy to be my golden master, but this is a laptop and I travel with it. I can use the iPhone for music on the road though.

Davide mentioned evaluating the Sonos system. I looked at it but not seriously. The prices for multiroom music made me look elsewhere. I may very well come back to it as time goes by.

I am interested in best value for the buck in both equipment and filesizes. I just want to make my traveling laptop sound great while I'm docked at home. I just bought the AudioEngine 5+ which is shielded so should work as a pc desktop speaker. I also bought their D1 DAC with volume control for the desktop. I will evaluate them in that configuration then probably buy their S8 Subwoofer after the bills clear :-)

I have ripped some lossless, but it is so reliant on the recording that I need to rip some high quality recorded CDs to make that serious evaluation. In the meantime I have experimented with mp3 320K and AAC fixed 256 and fixed 320 and VBR 256. I have no confidence that I can discern a listenable difference. I expect to get more serious after the upgrade mentioned above.

I am open to your experiences and a good happy medium to use beyond the obvious (lossless rips).

I am especially interested in replacing itunes. I really like the flexibility of Jriver MC 17 so far, but am prepared to eval more. I need iphone and ipod support and a good usable UI.

I am also happy to share my experiences with Jriver for those that are interested although this may fit better in a different forum section.

BannonB

Some thoughts:
If all your music is on your hard drive, and you are working on your laptop while playing music through your USB DAC, I suggest you get the music off of your hard drive and onto an external drive, because your hard disc gets hit a lot as you work on stuff, and this gets in the way of the audio signal.
External drive should use a different bus than your USB DAC, as I posted above.
iTunes does not load music into RAM and playback from RAM, it hits the drive where the music is stored (I think). JRiver has a check-box to playback music from memory, try checking this box to get rid of ticks and pops. Also adjust the buffering from the default 6 seconds to 10 or 20 seconds, if you can stand it. This is all under tools->options->settings.
Hearing a difference between lossless and lossy file formats is highly dependent on the quality of compression, the signal path/settings in the computer, and the quality of the system you are using, there are many, many variables.
I doubt you need special drivers, Windows 7 supports audio output up to 24bits/96kHz. If you get into some 24/192 or 24/384 high res files, from HD Tracks and the like, you might need special drivers, depending upon your DAC.
One more thing, at the risk of angering the budget audio gods, I have found that the USB cable counts. Big time. I have heard a vast difference in sound quality between USB cables in my system, I suggest Pangea PC, they are cheap, $25 for 0.5m at Audio Advisor, silver plated copper cable. You can return it if you don't hear an improvement over stock USB.
Sheesh this post is getting long, sorry about that. JRiver will also auto-detect the bit rate and sampling rate of your music track, and will adjust its output to match. iTunes will not do this. If you are only running 16/44.1 music rips, do not allow Windows to up-sample that output. Let your DAC do it, and set windows to output 16/44.1, if your DAC will take it. You want the computer doing as little as possible to the audio signal, turn off all processing.