high pitched noise

**whitethorn** · April 30th, 2010

Hi,

I have a
Audio device: Intel Corporation 82801JI (ICH10 Family) HD Audio Controller

I noticed that whenever the PCM slider is at 100% I get really wierd noise. I need to keep it at around -3db. How do I get that to work? I can't even move the slider around anymore.

**whitethorn** · May 5th, 2010

bump

**quadproc** · May 5th, 2010

Originally Posted by whitethorn

Hi,

I have a
Audio device: Intel Corporation 82801JI (ICH10 Family) HD Audio Controller

I noticed that whenever the PCM slider is at 100% I get really wierd noise. I need to keep it at around -3db. How do I get that to work? I can't even move the slider around anymore.

Which software version(s) are you running?

My motherboard also has an ICH10 but I don't have any audio problems running Ubuntu 9.10. I am waiting until 10.04 gets the majority of its bugs fixed before I try that release.

quaproc

**lidex** · May 6th, 2010

Can you post the output of these terminal commands for me please:

Code:

uname -a
aplay -l
cat /proc/asound/version
head -n 1 /proc/asound/card*/codec#*

Terminal="Applications->Accessories->Terminal"
Please post text output using code tags. Also helpful is the make/model of your PC/Laptop.

**whitethorn** · May 9th, 2010

I did a couple updates and now my ubuntu won't boot properly. I haven't really had time to try to fix it (I think it was a kernel panic) I was planning on doing a clean install anyway. But I can give you some of the output from the commands from my arch installation (installed it on the weekend, but I do still want to fix the pulseaudio problem).

Code:

uname -a
Linux wt-arch 2.6.33-ARCH #1 SMP PREEMPT Mon Apr 26 19:31:00 CEST 2010 x86_64 Intel(R) Core(TM)2 Quad CPU Q9650 @ 3.00GHz GenuineIntel GNU/Linux

Code:

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC1200 Analog [ALC1200 Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: ALC1200 Digital [ALC1200 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Code:

Advanced Linux Sound Architecture Driver Version 1.0.21.

Code:

Codec: Realtek ALC1200

I guess the only difference between running these commands in ubuntu to arch would be the kernel version, distro, and maybe the alsa version.

Is it possible to set the maximum value of the pcm slider to be -3dbs less than the actual maximum?

**lidex** · May 9th, 2010

You could try this, but I'm going on limited information here. Using a Terminal="Applications->Accessories->Terminal"
Open this file for editing:

Code:

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

Insert this line at the bottom:

Code:

 options snd-hda-intel probe_mask=1

Save. Close. Reboot. Check your levels in alsamixer.

Code:

 alsamixer

Press F6 to select the correct soundcard.
Press F3 to show playback levels. F4 selects capture levels [or use <Tab>]
Use the left/right arrow keys to select and up/down arrow keys to change levels. <M> to mute/unmute.
Go to "System ->Preferences ->Sound" and

**3rdalbum** · May 9th, 2010

You probably shouldn't have your PCM set to 100%. On most sound cards you'll get distortion. In your case, you're getting high-pitched noise. Keep it at 95% or lower and you should be fine.