ubuntustudio-bugs team mailing list archive

[Erich Eickmeyer  <1961998@xxxxxxxxxxxxxxxxxx>]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1961998

When reporting bugs in the future please use apport by using 'ubuntu-
bug' and the name of the package affected. You can learn more about this
functionality at https://wiki.ubuntu.com/ReportingBugs.

** Changed in: alsa-utils (Ubuntu)
       Status: New => Incomplete

-- 
You received this bug notification because you are a member of Ubuntu
Studio Bugs, which is subscribed to alsa-utils in Ubuntu.
Matching subscriptions: Ubuntu Studio Bugs
https://bugs.launchpad.net/bugs/1961998

Title:
  alsamixer: volume controls are assigned to wrong channels

Status in alsa-utils package in Ubuntu:
  Incomplete

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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/alsa-utils/+bug/1961998/+subscriptions