The version of pulseaudio in lucid-proposed has been removed as the bugs
it was fixing (including this one) were not verified in a timely
fashion.
** Tags removed: verification-needed
** Tags removed: removal-candidate
** Changed in: pulseaudio (Ubuntu Lucid)
Status: Fix Committed => Triaged
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https://bugs.launchpad.net/bugs/445849
Title:
Highpitched rattling like sound with 5.1 surround configuration
Status in PulseAudio sound server:
Invalid
Status in “pulseaudio” package in Ubuntu:
Fix Released
Status in “pulseaudio” source package in Lucid:
Triaged
Status in “pulseaudio” source package in Maverick:
Fix Released
Bug description:
SRU justification:
Pulseaudio contains volume scaling code optimized for the MMX and SSE
instruction sets on X86, and optimized volume scaling code for some ARM CPU
variants. This code initially did not deal with unusual numbers of channels, 3,
5, 6 and 7 on x86 using the SSE instruction set, and 3 on X86 using the MMX
instruction set, and ARM. This resulted in various odd sounds, such as
indicated in the original bug report below, and other comments in this report.
This SRU fixes the code to correctly deal with the above number of channels, 6
channels being common for 5.1 audio output. Thanks to David Henningsson for the
patch.
Regression potential:
There is a very low chance of this regressing other parts of PulseAudio. The
patch in question only touches the optimized code source files in the source
tree, so the chance of this affecting other users detrimentally is extremely
unlikely.
This fix is in the above linked pulseaudio natty branch, ready for
upload once natty is open for general development.
Original bug report follows:
Binary package hint: pulseaudio
I'm hearing a high pitched rattling sound when I have pulseaudio set to 5.1
surround
I set PulseAudio to 5.1 surround via the PulseAudio Volume Manager under the
Configuration Tab
I'm running the Karmic Koala beta with all the newest Updates
I have a 82801JI (ICH10 Family) HD Audio Controller
I've tried other settings under the Configuration Tab, Analog Stereo
seems to work perfectly but I have a 5.1 Surround Speaker Setup.
This problem seems to get worse as I increase the volume through
pulseaudio, if I change the volume of a individual channel it gets
almost impossible to listen to anything, all I can hear is a high
pitched rattling like sound. However if I set the volume of channels
individually through 'alsamixer' it doesn't screw up at all.
ProblemType: Bug
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: chris 2096 F.... pulseaudio
/dev/snd/pcmC0D0c: chris 2096 F...m pulseaudio
/dev/snd/pcmC0D0p: chris 2096 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf9ff8000 irq 22'
Mixer name : 'Realtek ALC1200'
Components : 'HDA:10ec0888,104382fe,00100101'
Controls : 40
Simple ctrls : 22
Date: Wed Oct 7 18:01:59 2009
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: nvidia
Package: pulseaudio 1:0.9.18-0ubuntu3
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: pulseaudio
Uname: Linux 2.6.31-pae i686
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