Public bug reported:

I have a turntable with a built in audio interface. It shows up in lsusb as:
Bus 003 Device 002: ID 08bb:29c0 Texas Instruments Japan PCM2900C Audio CODEC

Both the input and the output are shown in the audio settings of 
gnome-control-center, but when I try to select the input, it just segfaults.
alsamixer says there is no input at all.

/proc/asound/cards:
 0 [SB             ]: HDA-Intel - HDA ATI SB
                      HDA ATI SB at 0xfe024000 irq 16
 1 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xfbffc000 irq 19
 2 [CODEC          ]: USB-Audio - USB AUDIO  CODEC
                      BurrBrown from Texas Instruments USB AUDIO  CODEC at 
usb-0000:00:12.0-2, full s

/proc/asound/card2/pcm0c/info:
card: 2
device: 0
subdevice: 0
stream: CAPTURE
id: USB Audio
name: USB Audio
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1

lsb_release -rd:
Description:    Ubuntu 12.10
Release:        12.10

alsa-base:
  Installiert: 1.0.25+dfsg-0ubuntu3
  Kandidat:    1.0.25+dfsg-0ubuntu3
  Versionstabelle:
 *** 1.0.25+dfsg-0ubuntu3 0
        500 http://de.archive.ubuntu.com/ubuntu/ quantal/main amd64 Packages
        100 /var/lib/dpkg/status

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: input pcm2900 pcm2900c usb

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https://bugs.launchpad.net/bugs/1094003

Title:
  No input for Texas Instruments PCM2900C

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