noisy sound after starting mumble

[Tobias]

Description: Ubuntu precise (development branch)
Release: 12.04

mumble:
  Installiert: 1.2.3-2ubuntu4
  Kandidat: 1.2.3-2ubuntu4
  Versionstabelle:
 *** 1.2.3-2ubuntu4 0
        500 http://de.archive.ubuntu.com/ubuntu/ precise/universe amd64 Packages
        100 /var/lib/dpkg/status

> cat /proc/asound/cards
 0 [SB ]: HDA-Intel - HDA ATI SB
                      HDA ATI SB at 0xfe024000 irq 16

> head -n 1 /proc/asound/card0/codec*
Codec: Realtek ALC888

Everytime I start mumble all of the sounds are getting really weird. I will try to describe it:

When I would play a simple sound like a short "beep", I am going to hear a totally broken "beep" at first and then a second echo. But that echo Sound is OK....not broken. Try to image listening music with these effects. When I don't restart my music-player or whatever I use, this effect will remain. When I wait a few minutes and then restart my music-player (or game etc.), everything is OK and I can use mumble. I tried this on natty, oneiric and now precise beta, they are all the same. I tried Kubuntu und Xubuntu as well.
I tried to configure mumble using ALSA only or PulseAudio only, and they also work the same.

Maybe good to know:
When I use PulseAudio for AudioInput and my audio input is too loud (I speak too loud or input volume is too high) the sound will "break" to a noisy sound. Using ALSA fixes this. But this may be another problem.

ProblemType: BugDistroRelease: Ubuntu 12.04
Package: mumble 1.2.3-2ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu4
Architecture: amd64
Date: Wed Apr 18 17:45:39 2012InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)SourcePackage: mumble
UpgradeStatus: Upgraded to precise on 2012-04-04 (13 days ago)

[Tobias (seppeeel)]

I forgot:

i tried some options for snd-hda-intel in

/etc/modprobe.d/alsa-base.conf

Changing these options could not fix it.
alsa-base.conf -> attachment

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Tuomas Heino (iheino+ub)]

I have noticed similar issues with ALC892, please have a look at Bug #975135. For me alsa-only (with pasuspender) seems to keep sound quality ok, but that setup has issues mentioned at Bug #986774.

[Tobias (seppeeel)]

I tested teamspeak3 today - same problems. Seems like the sound driver for ALC888 is buggy when using microphone.

Where should this bug description moved to then?