What does the blacklist mean in /etc/modprobe.conf:
blacklist audio
blacklist snd-usb-audio
I realize it's a bit late, but a blacklist command tells the kernel to not use the blacklisted item. If you actually need that item, you can either remove the line, or comment it by placing a
# in front of it.
# blacklist audio
# blacklist snd-usb-audio