> options snd-intel8x0 index=0 > options snd-usb-audio index=1,3,4 vid=0x0582 > Something that should improve a lot : add the option nrpacks=1 to the module snd-usb-audio and check this : $ zcat /proc/config.gz | grep -e CONFIG_EXPERIMENTAL -e USB_BANDWIDTH if the output is this : CONFIG_EXPERIMENTAL=y # CONFIG_USB_BANDWIDTH is not set you are okay :) You can put a period of 3 to jackd and tweak the frames as you need. if not, good kernel compilation ! Regards Philippe