Red Hat Bugzilla – Bug 621725
Wrong mixer channels used for volume control
Last modified: 2011-06-03 01:36:42 EDT
Description of problem:
PulseAudio is manipulating the wrong channels on my sound card for volume control. My card has a 'Master Front' but changing the volume in PulseAudio affects the 'Front', 'Surround' and 'LFE' and only one channel of each. The effect of lowing volume is not what is desired. This is in 5.1 configuration. In 2 speaker configuration, the 'Front' only is used. As such I'm having to rely on alsamixer for proper management of my volume levels.
Version-Release number of selected component (if applicable):
00:07.0 Audio device: nVidia Corporation MCP72XE/MCP72P/MCP78U/MCP78S High Definition Audio (rev a1)
This may need to be a separate bug report, but when I first switched to 5.1 config, the volume of the 'PCM' channel was set so high that a high pitch distortion was added.
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This bug report was opened, and remained unattended for 5 months.