Sound playback stutters for no reason

[Fechin]

Okay, I downloaded Mixxx about an hour ago and have been trying to figure out why this happens since. When I load a song into one of the channels and play it, the sound stutters and doesn't play at full speed. I've messed with the sound API (used all the choices and they all sound the same), changed the latency (even all the way to 400ms) and shut down all other processes running on my computer (shouldn't affect it anyway). This shouldn't be happening as I am able to run playback out of Acid Pro 6, FL Studio 8 XXL Edition (with the ASIO4All drivers selected and latency at 30ms), Winamp, and WMP all at the same time and not get this kind of error. Here are my specs:

Windows XP SP3
Intel Core2Duo 1.86Ghz CPU (so technically it's 3.74Ghz)
1GB DDR2 RAM
Soundblaster Live! 24-bit edition
nVidia GeForce 8800GT (what reason the faq had for saying my video drivers had anything to do with it, I will never know)

Every driver is updated to the newest version (Creative has stopped support for the Live! series of soundcards) and before I load Mixxx, my CPU load is between 0 - 2% (and that's with ALL my background applications running) but after I load Mixxx the usage jumps to 50% for absolutely no reason. This program should not require this much resources to run as it is a simple mixing program. Hell, even running Acid Pro and FL at the same time only jumps me up to 10% usage, and that's with both of them playing back Multi-Layered songs at the same time.

Please, I really need help with this. I don't have the money for CD Decks right now and I really wanna finish up some sets so I can get a promotional out to some clubs around here. Any help would be greatly appreciated.

[prolix]

Hi, have you tried the kx drivers? http://kxproject.lugosoft.com/

[Fechin]

That was actually a great idea. I went to check on the site though and the drivers only support from the 10k1 Emulator and up. Unfortunately, the Live! 24-bit doesn't have the 10k1 or 10k2 emulator. Thank you for your help though.

[Fechin]

Oh snap, I just figured this stuff out (as far as the sound stuttering goes).

Looked over the settings once again, and found that if I turn the EQ on the highs down just a bit in the preferences menu it stops the stuttering AND lets me keep my Dynamic EQ settings.
Okay, one problem solved, now on to the next. Now I can't get the BPM analyzer to give real tempos. It keeps displaying my tempos as around 87 to 115 BPM which I know for a fact is not correct. I even tried it with a track I created in Acid Pro with a BPM of 150 and it came up saying 75. Well, at least I know to double my BPM, but still, that is quite annoying. Was wondering if there are any other BPM schemes out there that might help. I have mine set to 70 - 180 and to check the entire song and even set it above that range but they come out the same each time. I've tried MixMeister's BPM analyzer but I get the same results. I guess these just don't work well for DnB.

Also, was hoping someone could help with the CPU usage still. It should not be using 50% of my processor.. -_-