Dear debian users,
I have recently set up a debian wheezy on an ASUS A73B series.
Everything went well except that the sound is very scratchy. I can
play sound but there is an additional annoying noise, like a bad
communication on old land lines: scrrrtch scrrrtch. The higher the
volume, the higher the frequency of the scratches (and volume too). It
sounds a bit like a saturated amplifier, but not exactly. It's more
like a bad contact which would always work badly. There is a dual boot
on the computer and the sound is working perfectly well on another non
free operating system. So I suppose that the hardware is ok.
I have checked the volumes and they are not at the max. I have tried
to play with alsa settings without any improvement.
I tried adding a PCM channel in order to reduce this effect (see
.asoundrc below). I can change the volume with three channels: master,
PCM, speaker.
I have tried removing pulseaudio, alsa-base, reinstalling them one by
one... I finally installed paman and pavucontrol and played with them,
but nothing worked.
Any help or hint would be very welcome. Here is my setup:
$ aplay -l
**** Liste des Périphériques Matériels PLAYBACK ****
carte 0: SB [HDA ATI SB], périphérique 0: ALC269VB Analog [ALC269VB Analog]
Sous-périphériques: 1/1
Sous-périphérique #0: subdevice #0
carte 1: Generic [HD-Audio Generic], périphérique 3: HDMI 0 [HDMI 0]
Sous-périphériques: 1/1
Sous-périphérique #0: subdevice #0
$ aplay -L
http://paste.debian.net/246281/
$ cat .asoundrc
pcm.!default front:SB
$ cat /proc/asound/card*/codec#0 | grep -i codec
Codec: Realtek ALC269VB
Codec: ATI R6xx HDMI
$ cat /proc/asound/modules
0 snd_hda_intel
1 snd_hda_intel
$ lspci -nn |grep Audio
00:14.2 Audio device [0403]: Advanced Micro Devices [AMD] nee ATI
SBx00 Azalia (Intel HDA) [1002:4383] (rev 40)
01:00.1 Audio device [0403]: Advanced Micro Devices [AMD] nee ATI
Caicos HDMI Audio [Radeon HD 6400 Series] [1002:aa98]
$ lsmod | grep snd
http://paste.debian.net/246284/
$ cat /etc/modprobe.d/alsa-base.conf
http://paste.debian.net/246285/
$ aptitude search "~dsound ~i"
http://paste.debian.net/246286/
$ cat /etc/apt/sources.list
deb http://ftp.fr.debian.org/debian/ wheezy main contrib non-free
deb-src http://ftp.fr.debian.org/debian/ wheezy main
deb http://security.debian.org/ wheezy/updates main contrib
deb-src http://security.debian.org/ wheezy/updates main contrib
I am completely lost. Can anyone give me some hints regarding this please?
Best regards,