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In Windows 7 Control Panel -> Sound -> Sound Properties window there's an slider for setting CD Audio volume:

enter image description here

And it's pretty strange that I can't find corresponding one in generic Linux mixers: alsamixer or amixer.

I connected a CD drive to try to set CD audio volume with cdcd (CD Player):

$ cdcd setvol 0
Invalid volume

It isn't actually an invalid volume, it is because ioctl() call fails. I found that out after searching and changing a bit the source code of this utility (in the libcdaudio):

--- cdaudio.c.orig  2004-09-09 06:26:20.000000000 +0600
+++ cdaudio.c   2012-05-30 21:34:34.167915521 +0600
@@ -578,8 +578,10 @@

-  if(ioctl(cd_desc, CDAUDIO_SET_VOLUME, &cdvol) < 0)
-    return -1;
+  if(ioctl(cd_desc, CDAUDIO_SET_VOLUME, &cdvol) < 0) {
+     printf("*** cd_set_volume: ioctl() returned error\n");
+     return -1;
+  }

   return 0;

By the way cdcd's get volume command yields rather weird output:

         Left  Right
Front 1281734864  32767
Back        0      0

Also I tried aumix:

$ aumix -c 0

But all with no success.

I read from this manual — (section 6.2 The mixer) that CD channel can present in amixer output. Maybe some drivers for sound card are missing in my Ubuntu 12.04 LTS installation. Though I don't think it's the case:

$ lsmod | grep snd
snd_mixer_oss          22602  0 
snd_hda_codec_hdmi     32474  1 
snd_hda_codec_realtek   223867  1 
snd_hda_intel          33773  4 
snd_hda_codec         127706  3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
snd_hwdep              13668  1 snd_hda_codec
snd_pcm                97188  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_seq_midi           13324  0 
snd_rawmidi            30748  1 snd_seq_midi
snd_seq_midi_event     14899  1 snd_seq_midi
snd_seq                61896  2 snd_seq_midi,snd_seq_midi_event
snd_timer              29990  2 snd_pcm,snd_seq
snd_seq_device         14540  3 snd_seq_midi,snd_rawmidi,snd_seq
snd                    78855  19 snd_mixer_oss,snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep ,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore              15091  1 snd
snd_page_alloc         18529  2 snd_hda_intel,snd_pcm

All I need is just mute or set to 0 volume level of CD Audio channel, like I did in Windows 7, to get rid of sibilant noise in the speakers.

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What Linux distribution are you using? – Oliver Salzburg May 28 '12 at 15:43
up vote 1 down vote accepted

Finally I managed to solve this problem by entirely replacing audio subsystem with OSS 4.

Related packages:

ii  oss-compat     2                         amd64    Open Sound System (OSS) compatibility package
ii  oss4-base      4.2-build2006-2+deb7u1    amd64    Open Sound System - base package
ii  oss4-dkms      4.2-build2006-2+deb7u1    amd64    Open Sound System - DKMS module sources
ii  oss4-gtk       4.2-build2006-2+deb7u1    amd64    Open Sound System - simple GTK2-based mixer control
ii  oss4-source    4.2-build2006-2+deb7u1    amd64    Open Sound System - drivers sources

And the sound quality is now excellent. I really can't understand why it is being deprecated in some popular distributions.

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