/sys/class/sound/card0/device/:
-r--r--r--    1 root     root          4096 Nov 12 23:11 ari_enabled
-rw-r--r--    1 root     root          4096 Nov 12 23:11 broken_parity_status
-r--r--r--    1 root     root          4096 Nov 12 23:11 class
-rw-r--r--    1 root     root          4096 Nov 12 23:11 config
-r--r--r--    1 root     root          4096 Nov 12 23:11 consistent_dma_mask_bits
-r--r--r--    1 root     root          4096 Nov 12 23:11 current_link_speed
-r--r--r--    1 root     root          4096 Nov 12 23:11 current_link_width
-rw-r--r--    1 root     root          4096 Nov 12 23:11 d3cold_allowed
-r--r--r--    1 root     root          4096 Nov 12 23:11 device
-r--r--r--    1 root     root          4096 Nov 12 23:11 dma_mask_bits
lrwxrwxrwx    1 root     root             0 Nov 12 23:11 driver -> ../../../bus/pci/drivers/snd_hda_intel
-rw-r--r--    1 root     root          4096 Nov 12 23:11 driver_override
-rw-r--r--    1 root     root          4096 Nov 12 23:11 enable
lrwxrwxrwx    1 root     root             0 Nov 12 23:11 firmware_node -> ../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1e
drwxr-xr-x    4 root     root             0 Nov 12 23:11 hdaudioC0D0
-r--r--r--    1 root     root          4096 Nov 12 23:11 irq
-r--r--r--    1 root     root          4096 Nov 12 23:11 local_cpulist
-r--r--r--    1 root     root          4096 Nov 12 23:11 local_cpus
-r--r--r--    1 root     root          4096 Nov 12 23:11 max_link_speed
-r--r--r--    1 root     root          4096 Nov 12 23:11 max_link_width
-r--r--r--    1 root     root          4096 Nov 12 23:11 modalias
-rw-r--r--    1 root     root          4096 Nov 12 23:11 msi_bus
drwxr-xr-x    2 root     root             0 Nov 12 23:11 power
--w--w----    1 root     root          4096 Nov 12 23:11 remove
--w--w----    1 root     root          4096 Nov 12 23:11 rescan
--w-------    1 root     root          4096 Nov 12 23:11 reset
-r--r--r--    1 root     root          4096 Nov 12 23:11 resource
-rw-------    1 root     root         16384 Nov 12 23:11 resource0
-r--r--r--    1 root     root          4096 Nov 12 23:11 revision
drwxr-xr-x    3 root     root             0 Nov 12 23:11 sound
lrwxrwxrwx    1 root     root             0 Nov 12 23:11 subsystem -> ../../../bus/pci
-r--r--r--    1 root     root          4096 Nov 12 23:11 subsystem_device
-r--r--r--    1 root     root          4096 Nov 12 23:11 subsystem_vendor
-rw-r--r--    1 root     root          4096 Nov 12 23:11 uevent
-r--r--r--    1 root     root          4096 Nov 12 23:11 vendor

/sys/class/sound/card1/device/:
-rw-r--r--    1 root     root          4096 Nov 12 23:11 authorized
-r--r--r--    1 root     root          4096 Nov 12 23:11 bAlternateSetting
-r--r--r--    1 root     root          4096 Nov 12 23:11 bInterfaceClass
-r--r--r--    1 root     root          4096 Nov 12 23:11 bInterfaceNumber
-r--r--r--    1 root     root          4096 Nov 12 23:11 bInterfaceProtocol
-r--r--r--    1 root     root          4096 Nov 12 23:11 bInterfaceSubClass
-r--r--r--    1 root     root          4096 Nov 12 23:11 bNumEndpoints
lrwxrwxrwx    1 root     root             0 Nov 12 23:11 driver -> ../../../../../../bus/usb/drivers/snd-usb-audio
-r--r--r--    1 root     root          4096 Nov 12 23:11 iad_bFirstInterface
-r--r--r--    1 root     root          4096 Nov 12 23:11 iad_bFunctionClass
-r--r--r--    1 root     root          4096 Nov 12 23:11 iad_bFunctionProtocol
-r--r--r--    1 root     root          4096 Nov 12 23:11 iad_bFunctionSubClass
-r--r--r--    1 root     root          4096 Nov 12 23:11 iad_bInterfaceCount
-r--r--r--    1 root     root          4096 Nov 12 23:11 modalias
drwxr-xr-x    2 root     root             0 Nov 12 23:11 power
drwxr-xr-x    3 root     root             0 Nov 12 23:11 sound
lrwxrwxrwx    1 root     root             0 Nov 12 23:11 subsystem -> ../../../../../../bus/usb
-r--r--r--    1 root     root          4096 Nov 12 23:11 supports_autosuspend
-rw-r--r--    1 root     root          4096 Nov 12 23:11 uevent