$ ls /dev/snd/*
crw-rw---- 1 root audio 116,  9 Nov 16 19:51 /dev/snd/controlC0
crw-rw---- 1 root audio 116,  2 Nov 16 19:51 /dev/snd/controlC1
crw-rw---- 1 root audio 116, 14 Nov 16 21:45 /dev/snd/controlC2
crw-rw---- 1 root audio 116, 11 Nov 16 21:44 /dev/snd/pcmC0D0c
crw-rw---- 1 root audio 116, 10 Nov 16 21:44 /dev/snd/pcmC0D0p
crw-rw---- 1 root audio 116, 12 Nov 16 21:44 /dev/snd/pcmC0D1p
crw-rw---- 1 root audio 116, 13 Nov 16 18:58 /dev/snd/pcmC0D2c
crw-rw---- 1 root audio 116,  7 Nov 16 21:44 /dev/snd/pcmC1D10p
crw-rw---- 1 root audio 116,  8 Nov 16 21:44 /dev/snd/pcmC1D11p
crw-rw---- 1 root audio 116,  3 Nov 16 21:44 /dev/snd/pcmC1D3p
crw-rw---- 1 root audio 116,  4 Nov 16 21:44 /dev/snd/pcmC1D7p
crw-rw---- 1 root audio 116,  5 Nov 16 21:44 /dev/snd/pcmC1D8p
crw-rw---- 1 root audio 116,  6 Nov 16 21:44 /dev/snd/pcmC1D9p
crw-rw---- 1 root audio 116, 16 Nov 16 21:45 /dev/snd/pcmC2D0c
crw-rw---- 1 root audio 116, 15 Nov 16 21:45 /dev/snd/pcmC2D0p
crw-rw---- 1 root audio 116, 18 Nov 16 21:45 /dev/snd/pcmC2D1c
crw-rw---- 1 root audio 116, 17 Nov 16 21:45 /dev/snd/pcmC2D1p
crw-rw---- 1 root audio 116,  1 Nov 16 19:51 /dev/snd/seq
crw-rw---- 1 root audio 116, 33 Nov 16 19:51 /dev/snd/timer

/dev/snd/by-id:
total 0
drwxr-xr-x 2 root root  60 Nov 16 21:45 .
drwxr-xr-x 4 root root 460 Nov 16 21:45 ..
lrwxrwxrwx 1 root root  12 Nov 16 21:45 usb-Astro_Gaming_Astro_MixAmp_Pro-00 -> ../controlC2

/dev/snd/by-path:
total 0
drwxr-xr-x 2 root root 100 Nov 16 21:45 .
drwxr-xr-x 4 root root 460 Nov 16 21:45 ..
lrwxrwxrwx 1 root root  12 Nov 16 21:45 pci-0000:00:14.0-usb-0:1:1.0 -> ../controlC2
lrwxrwxrwx 1 root root  12 Nov 16 19:51 pci-0000:00:1b.0 -> ../controlC0
lrwxrwxrwx 1 root root  12 Nov 16 19:51 pci-0000:01:00.1 -> ../controlC1


$ cat /proc/asound/cards
 0 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xf7f30000 irq 28
 1 [HDMI           ]: HDA-Intel - HDA ATI HDMI
                      HDA ATI HDMI at 0xf7e60000 irq 29
 2 [Pro            ]: USB-Audio - Astro MixAmp Pro
                      Astro Gaming Astro MixAmp Pro at usb-0000:00:14.0-1, high speed

                      
$ cat /proc/asound/devices
  1:        : sequencer
  2: [ 1]   : control
  3: [ 1- 3]: digital audio playback
  4: [ 1- 7]: digital audio playback
  5: [ 1- 8]: digital audio playback
  6: [ 1- 9]: digital audio playback
  7: [ 1-10]: digital audio playback
  8: [ 1-11]: digital audio playback
  9: [ 0]   : control
 10: [ 0- 0]: digital audio playback
 11: [ 0- 0]: digital audio capture
 12: [ 0- 1]: digital audio playback
 13: [ 0- 2]: digital audio capture
 14: [ 2]   : control
 15: [ 2- 0]: digital audio playback
 16: [ 2- 0]: digital audio capture
 17: [ 2- 1]: digital audio playback
 18: [ 2- 1]: digital audio capture
 33:        : timer