lsmod | grep usb.audio
snd_usb_audio          74272  0
snd_pcm                69892  1 snd_usb_audio
snd_usb_lib            14944  1 snd_usb_audio
snd_hwdep               7396  1 snd_usb_audio
snd                    46276  6 snd_usb_audio,snd_pcm,snd_timer,snd_rawmidi,snd_seq_device,snd_hwdep
usbcore               112960  7 snd_usb_audio,snd_usb_lib,usbmouse,usbhid,ehci_hcd,ohci_hcd