distorted sound through IEC958
Bug #172654 reported by
Sami Haahtinen
This bug affects 6 people
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
pulseaudio (Ubuntu) |
Expired
|
Medium
|
Unassigned |
Bug Description
Binary package hint: pulseaudio
All sound that comes through pulseaudio to the speakers connected to a docking station is distorted. The output has a high pitch in it. Without pulseaudio output is normal. The internal headphone plug is not affected by this (and it doesn't use IEC958 for output)
Computer is a Dell Latitude D610 with ICH6 sound chip.
So far I've tested that the problem is not in my configuration by going around pulseaudio either by setting the default gstreamer output to alsasink and by using vlc to output directly to alsa output. Both gstreamer pipelines and vlc are affected if the output is redirected to pulseaudio.
Changed in pulseaudio: | |
importance: | Undecided → Low |
status: | New → Incomplete |
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After a bit of digging around i found this bit in Bug #55150:
-- Snip --
amixer controls %% search the id of IEC-default (at my system 35)
amixer -c 0 cset numid=35 6 %% 6 = 96kHz
-- Snip --
At the moment i don't really understand yet why it works and why things work without pulseaudio even without this setting. It might be that this bug is actually in alsa and not in the way how pulseaudio uses alsa.