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Thread: HOWTO: PulseAudio Fixes & System-Wide Equalizer Support

  1. #91
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    Re: HOWTO: PulseAudio Fixes & System-Wide Equalizer Support (Hardy Heron)

    Quote Originally Posted by psyke83 View Post
    How is your sound when using Windows?
    I wouldn't know. Although my brother has a similar laptop with the docking station and Windows XP - everything works fine.

    So if I go to my Sound Options and explicitly select ALSA for sound events and music+movies, and still have a problem, the issue is definitely not PulseAudio?
    Disclaimer: All of my advice is guaranteed without exception to work. If you find my advice unsatisfactory, you didn't do it right.

  2. #92
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    Re: HOWTO: PulseAudio Fixes & System-Wide Equalizer Support (Hardy Heron)

    Quote Originally Posted by Meson View Post
    I wouldn't know. Although my brother has a similar laptop with the docking station and Windows XP - everything works fine.

    So if I go to my Sound Options and explicitly select ALSA for sound events and music+movies, and still have a problem, the issue is definitely not PulseAudio?
    If you followed this guide, no. When an application tries to use ALSA output, it will be directed to PulseAudio (because of modifications to /etc/asound.conf).

    To check if it's caused by PulseAudio, you need to "pkill pulseaudio", delete /etc/asound.conf and see if sound works ok afterwards.

  3. #93
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    Re: HOWTO: PulseAudio Fixes & System-Wide Equalizer Support (Hardy Heron)

    omg! it worked!
    I think I love you <3 lol
    I feel so old... so very old

    My rig(s) (in 2007)
    http://ubuntuforums.org/showpost.php...postcount=1405

  4. #94
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    Re: HOWTO: PulseAudio Fixes & System-Wide Equalizer Support (Hardy Heron)

    Quote Originally Posted by psyke83 View Post
    you need to "pkill pulseaudio", delete /etc/asound.conf and see if sound works ok afterwards.
    Ok, major breakthrough, my sound works nicely after this. I guess I need to tweak the fragment number and size in /etc/pulse/daemon.conf. Odd though as I have the same card as you. Do I need to restart anything after modifying this file or do the changes take affect immediately?
    Disclaimer: All of my advice is guaranteed without exception to work. If you find my advice unsatisfactory, you didn't do it right.

  5. #95
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    Re: HOWTO: PulseAudio Fixes & System-Wide Equalizer Support (Hardy Heron)

    Quote Originally Posted by Meson View Post
    Ok, major breakthrough, my sound works nicely after this. I guess I need to tweak the fragment number and size in /etc/pulse/daemon.conf. Odd though as I have the same card as you. Do I need to restart anything after modifying this file or do the changes take affect immediately?
    They take effect after restarting pulseaudio. You can log out and back in, or:

    Code:
    $ pkill pulseaudio
    $ pulseaudio

  6. #96
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    Re: HOWTO: PulseAudio Fixes & System-Wide Equalizer Support (Hardy Heron)

    Hey thanks to you all.

    Skype is working fine. Installed the normal Ubuntu/Debian version as suggested and set it as following:

    Code:
    Sound In: VIA 8237 (hw:V8237,0)
    Sound Out: pulse
    Ringing: pulse
    The packet loss is now close to zero.

    Thank you all

  7. #97
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    Re: HOWTO: PulseAudio Fixes & System-Wide Equalizer Support (Hardy Heron)

    I looking for how to change the equalizer. I found on Archlinux some information about it. (http://wiki.archlinux.org/index.php/...Wide_Equalizer).

    Also the next comment about controls in asound.conf, what helps me in the right the direction:
    ...
    input {
    controls [ -5 -5 -5 -5 -5 -10 -20 -15 -10 -10 -10 -10 -10 -3 -2 ]
    ...
    #this setting is here by example, edit to your own taste
    #bands: 50hz, 100hz, 156hz, 220hz, 311hz, 440hz, 622hz, 880hz, 1250hz, 1750hz, 25000hz,
    #50000hz, 10000hz, 20000hz

    My question is here what do the numbers mean in controls [ ... ]? Is this the change you want in decibels? So you can leave it zero when a part of the bandwidth should not change?
    Last edited by klap-in; May 17th, 2008 at 10:43 PM. Reason: layout

  8. #98
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    Re: HOWTO: PulseAudio Fixes & System-Wide Equalizer Support (Hardy Heron)

    Quote Originally Posted by ferrarix View Post
    Hey thanks to you all.

    Skype is working fine. Installed the normal Ubuntu/Debian version as suggested and set it as following:

    Code:
    Sound In: VIA 8237 (hw:V8237,0)
    Sound Out: pulse
    Ringing: pulse
    The packet loss is now close to zero.

    Thank you all
    Ok, but packet loss in Skype refers to network activity; a misconfigured PulseAudio can skip like crazy even with 0% packet loss. Glad it's working fine for you, though!

  9. #99
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    Re: HOWTO: PulseAudio Fixes & System-Wide Equalizer Support (Hardy Heron)

    Quote Originally Posted by klap-in View Post
    input {
    controls [ -5 -5 -5 -5 -5 -10 -20 -15 -10 -10 -10 -10 -10 -3 -2 ]
    ...
    #this setting is here by example, edit to your own taste
    #bands: 50hz, 100hz, 156hz, 220hz, 311hz, 440hz, 622hz, 880hz, 1250hz, 1750hz, 25000hz,
    #50000hz, 10000hz, 20000hz

    My question is here what do the numbers mean in controls [ ... ]? Is this the change you want in decibels? So you can leave it zero when a part of the bandwidth should not change?
    The numbers in controls [ ] are indeed parameters, but it's complicated. The amount of parameters as well as their lower and upper limits are different for each LADSPA plugin. In the above example, the plugin "mbeq" is an Equalizer that allows you to adjust those bands.

    You will need to find a program that exposes the LADSPA parameters to know how to change them effectively.

    In the package "ladspa-sdk" you can get a listing of installed plugins via "listplugins" and you can see the available parameters for a single plugin via "analyseplugin". Here is the information for the plugin used in this HOWTO:

    Code:
    conn@inspiron:~$ analyseplugin /usr/lib/ladspa/mbeq_1197.so 
    
    Plugin Name: "Multiband EQ"
    Plugin Label: "mbeq"
    Plugin Unique ID: 1197
    Maker: "Steve Harris <steve@plugin.org.uk>"
    Copyright: "GPL"
    Must Run Real-Time: No
    Has activate() Function: Yes
    Has deativate() Function: No
    Has run_adding() Function: Yes
    Environment: Normal or Hard Real-Time
    Ports:	"50Hz gain (low shelving)" input, control, -70 to 30, default 0
    	"100Hz gain" input, control, -70 to 30, default 0
    	"156Hz gain" input, control, -70 to 30, default 0
    	"220Hz gain" input, control, -70 to 30, default 0
    	"311Hz gain" input, control, -70 to 30, default 0
    	"440Hz gain" input, control, -70 to 30, default 0
    	"622Hz gain" input, control, -70 to 30, default 0
    	"880Hz gain" input, control, -70 to 30, default 0
    	"1250Hz gain" input, control, -70 to 30, default 0
    	"1750Hz gain" input, control, -70 to 30, default 0
    	"2500Hz gain" input, control, -70 to 30, default 0
    	"3500Hz gain" input, control, -70 to 30, default 0
    	"5000Hz gain" input, control, -70 to 30, default 0
    	"10000Hz gain" input, control, -70 to 30, default 0
    	"20000Hz gain" input, control, -70 to 30, default 0
    	"Input" input, audio
    	"Output" output, audio
    	"latency" output, control

    If you install Audacious* and the extra plugins (audacious-plugins-extra), there is a plugin that allows you to apply a LADSPA plugin and adjust the parameters via a GUI in realtime.

    I am no expert with LADSPA plugins, so you're better off doing your own research. At the very least you have the answer to your questions (see the anaylseplugin output); the bands are listed and you can see that defining a control as "0" effectively leaves the band unchanged.

    * Remember that if you set up the system-wide EQ via Part D and try to experiment with Audacious' LADSPA plugin, you will hear output filtered *twice*. This is not a good thing. Therefore, you must remove the "pcm.equalizer" section from asound.conf before messing with Audacious.

  10. #100
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    Re: HOWTO: PulseAudio Fixes & System-Wide Equalizer Support (Hardy Heron)

    Part A,B and C worked for me Great job. Thanks a lot. Now i can watch flash videos with firefox 3 beta 5 while playing music in rhythmbox and watching video in movie player. No crashes in firefox and no stuttering audio. Now i will try Part D to hear some more good sound

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