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[dsteinwe <1961998@xxxxxxxxxxxxxxxxxx>]

apport information

** Attachment added: "ProcCpuinfoMinimal.txt"
   https://bugs.launchpad.net/bugs/1961998/+attachment/5583400/+files/ProcCpuinfoMinimal.txt

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https://bugs.launchpad.net/bugs/1961998

Title:
  alsamixer: volume controls are assigned to wrong channels

Status in alsa-utils package in Ubuntu:
  Expired

Bug description:
  I have tested the alsamixer with 2 different 8ch usb sound cards (UAC2
  compatible) and the assignment of the volume controls to the
  respective channel is partly wrong on both cards. The volume control
  for rear changes the volume of the center and subwoofer/LFE and the
  volume control for "Center" and "Woofer" changes the volume of the
  rear speakers.

  According to the usb audio class 2 specification, chapter "4.1 Audio Channel Cluster Descriptor", the volume controls index must be (for a 8ch sound card):
  1 = FL
  2 = FR
  3 = C
  4 = LFE
  5 = RL
  6 = RR
  7 = SL
  8 = SR

  The current implementation as following assignment:
  1 = FL
  2 = FR
  3 = RL
  4 = RR
  5 = C
  6 = LFE
  7 = SL
  8 = SR

  Unfortunately, I can not judge whether this is a problem in the
  program or driver (audio usb).

  If you have any questions, feel free to contact me.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu71.1
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: X-Cinnamon
  DistroRelease: Ubuntu 21.10
  InstallationDate: Installed on 2019-11-02 (905 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  Package: alsa-utils 1.2.4-1ubuntu4
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 5.13.0-37.42-generic 5.13.19
  RebootRequiredPkgs: Error: path contained symlinks.
  Tags:  impish
  Uname: Linux 5.13.0-37-generic x86_64
  UpgradeStatus: Upgraded to impish on 2021-10-22 (184 days ago)
  UserGroups: adm cdrom dialout dip libvirt lpadmin lxd plugdev sambashare sudo
  _MarkForUpload: True

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