==== ALSA ====

Problem mit mehreren Soundkarten.

  HDA ATI SB Realtek ALC889A
  Logitech Quickcam

USB Webcam wird immer als Device 0 und somit als Standardaudiogerät erkannt

  michael@gentux ~ $ cat /proc/asound/modules
  0 snd_usb_audio
  1 snd_hda_intel
  2 snd_hda_intel

Lösung: Datei /etc/modprobe.d/sound.conf anlegen und USB Device auf einen "hinteren" Platz verschieben

  michael@gentux ~ $ cat /etc/modprobe.d/sound.conf
  # List of audio devices and the way they should be loaded, to get rid of USB-Webcam becoming the default device
  options snd_usb_audio index=2

reboot!

  michael@gentux ~ $ cat /proc/asound/modules
  0 snd_hda_intel
  1 snd_hda_intel
  2 snd_usb_audio



Soundcarte und Codec identifizieren:
tuxbox modprobe.d # head -n 1 /proc/asound/card*/codec#0
==> /proc/asound/card1/codec#0 <==
Codec: Realtek ALC889A

==> /proc/asound/card3/codec#0 <==
Codec: ATI R6xx HDMI

Liste der Models für die Karte:

ALSA-Configuration.txt
HD-Audio.txt

ALC882/883/885/888/889
======================
  3stack-dig    3-jack with SPDIF I/O
  6stack-dig    6-jack digital with SPDIF I/O
  arima         Arima W820Di1
  targa         Targa T8, MSI-1049 T8
  asus-a7j      ASUS A7J
  asus-a7m      ASUS A7M
  macpro        MacPro support
  mb5           Macbook 5,1
  macmini3      Macmini 3,1
  mba21         Macbook Air 2,1
  mbp3          Macbook Pro rev3
  imac24        iMac 24'' with jack detection
  imac91        iMac 9,1
  w2jc          ASUS W2JC
  3stack-2ch-dig        3-jack with SPDIF I/O (ALC883)
  alc883-6stack-dig     6-jack digital with SPDIF I/O (ALC883)
  3stack-6ch    3-jack 6-channel
  3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
  6stack-dig-demo  6-jack digital for Intel demo board
  acer          Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
  acer-aspire   Acer Aspire 9810
  acer-aspire-4930g Acer Aspire 4930G
  acer-aspire-6530g Acer Aspire 6530G
  acer-aspire-7730g Acer Aspire 7730G
  acer-aspire-8930g Acer Aspire 8930G
  medion        Medion Laptops
  medion-md2    Medion MD2
  targa-dig     Targa/MSI
  targa-2ch-dig Targa/MSI with 2-channel
  targa-8ch-dig Targa/MSI with 8-channel (MSI GX620)
  laptop-eapd   3-jack with SPDIF I/O and EAPD (Clevo M540JE, M550JE)
  lenovo-101e   Lenovo 101E
  lenovo-nb0763 Lenovo NB0763
  lenovo-ms7195-dig Lenovo MS7195
  lenovo-sky    Lenovo Sky
  haier-w66     Haier W66
  3stack-hp     HP machines with 3stack (Lucknow, Samba boards)
  6stack-dell   Dell machines with 6stack (Inspiron 530)
  mitac         Mitac 8252D
  clevo-m540r   Clevo M540R (6ch + digital)
  clevo-m720    Clevo M720 laptop series
  fujitsu-pi2515 Fujitsu AMILO Pi2515
  fujitsu-xa3530 Fujitsu AMILO XA3530
  3stack-6ch-intel Intel DG33* boards
  intel-alc889a Intel IbexPeak with ALC889A
  intel-x58     Intel DX58 with ALC889
  asus-p5q      ASUS P5Q-EM boards
  mb31          MacBook 3,1
  sony-vaio-tt  Sony VAIO TT
  auto          auto-config reading BIOS (default)