[LAU] usb interface 4+ out channels?

[joachim heintz]

hi all -

i do urgently need a (professional) usb audio interface for my linux
laptop (ubuntu 11.04). i need at least 4 seperate output channels. i
don't have an express card slot or firewire.

i have looked at the alsa site and read many threads, but i couldn't
find any option which fits for my needs (emu0404 seems to work but needs
an additional digital-analog-converter).

any tip is very much appreciated.

	joachim