mixvibes u46mk2 Serato CD

[simply seth]

Under Preferences -> Vinyl Control , I have
Deck 1 U46DJ: USB Audio (hw: 1,0)
Deck 2 U46DJ: USB Audio (hw: 1,0)
Vinyl Type is set to Serato CD

I have the Left Deck connected to channels 1,2
I have the right deck connected to channesl 3,4
I have outputs 1,2 to the left side of my DJ mixer
I have outputs 3,4 to the right side of my DJ mixer

I am running Ubuntu 7.10 With the RT kernel
I am using a intel core 2 duo with 2 gigs of memory

I am using the latest mixxx 1.6 beta

the sound is choppy no matter what I set the latency to

and I cant seem to figure out how to get mixxx working correctly

I'm using libusbaudio driver (I think)