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After installing 12.04 Precise on my PC, I have encountered some problems with audio output which did no occur when using Lucid.

The sound is choppy and distorted in the lower tones. As I have no experience in setting/testing and doing anything with Audio Devices, I need help even to diagnose the problem.

Update

$ sudo lshw -c multimedia

  *-multimedia  

       description: Audio device
       product: Radeon X1200 Series Audio Controller
       vendor: Hynix Semiconductor (Hyundai Electronics)
       physical id: 5.2
       bus info: pci@0000:01:05.2
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list
       configuration: driver=snd_hda_intel latency=32
       resources: irq:19 memory:fdafc000-fdafffff
  *-multimedia
       description: Audio device
       product: SBx00 Azalia (Intel HDA)
       vendor: Hynix Semiconductor (Hyundai Electronics)
       physical id: 14.2
       bus info: pci@0000:00:14.2
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list
       configuration: driver=snd_hda_intel latency=32
       resources: irq:16 memory:fe024000-fe027fff

Update 2

It has something to do with the volume. If the audio is quiet it is not choppy, if the sound is loud then it begins to be choppy.

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Sorry, what do you mean by "low range"? Doesn't the choppiness and distortion affect all audio? –  izx May 17 '12 at 8:21
    
The sound is choppy in general, and distorted for low range tones only. For me it seems like some buffering problem, or something similar. –  Misery May 17 '12 at 8:23
1  
Please update question with pastebin of sudo lshw -c multimedia. –  izx May 17 '12 at 8:29
1  
I have this same problem... bassy sounds cause chopping/stuttering of playback in videos/audio. turning the volume down low reduces the choppiness. I can't listen to mp3 or watch vlc without sound freaking out. (snd_hda_intel driver for 6/C200 series Intel) –  beanaroo May 18 '12 at 10:05

2 Answers 2

up vote 5 down vote accepted

Misery, I seem to have found a solution on my system using the same driver (different audio device though)

  1. Open Terminal: gksudo gedit /etc/modprobe.d/alsa-base.conf
  2. Add the following line:

    options snd-hda-intel model=generic
    
  3. Restart System

My audio seems to be working fine now. Full volume, flash content, videos, audio files. Let us know if it helps.


Credit goes to Adityeah

share|improve this answer
    
it did the thing :] –  Misery May 21 '12 at 7:07
    
This has not helped me get sound working correctly in Steam. (For future Googlers) –  earthmeLon Nov 15 '13 at 18:32
    
@earthmeLon This solution is for a problem that is system-wide. Not limited to one application. Sorry. –  beanaroo Nov 17 '13 at 8:43

A possible solution is disabling "auto-mute" in alsamixer. It is used when the "switch-to-headphone-and-back-again" bug occurs (in high volumes mainly).

First, open your terminal, or press:

CTRL + ALT + T

Then, type and hit "enter":

$ alsamixer

This screen will show up:

Alsa mixer screen in terminal

Use the right arrow until you select "Auto-Mute"

Then, press the down arrow to set it do "Disable" (see the text above it).

That's it.

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