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Thread: muffled sound without equalizer/volume levels jumping with equalizer

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    Join Date
    Aug 2013
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    muffled sound without equalizer/volume levels jumping with equalizer

    Hello, I am new to ubuntu, I've installed it recently and there is a problem with my sound. Ubuntu version is 12.04 LTS (64 bit) and computer is acer aspire v3-551g-10466G75Makk laptop.
    Sound is muffled, like sound source is under blankets. Voices are like in the distance. I can clearly hear the difference between the sound in windows and the sound in ubuntu, especially in heaphones (the sound in speakers is affected too). It doesn't depend on program, I tried flash (youtube), rhythmbox and movie player. What I have already tried to solve the problem:
    a) Updating from Ubuntu Audio Dev team PPA - nothing changed
    b) Removing PulseAudio - nothing changed
    c) Installing Realtek High Definition Audio Codecs - sound disappeared
    d) Booting from Ubuntu 13.04 LiveCD (PulseAudio version 3.0) - sound is the same
    e) Playing with alsamixer - nothing changed
    The only thing that solved the problem was PulseAudio equalizer (I use Dolby Home Theater on Windows as equalizer) that I installed from here: http://www.webupd8.org/2011/04/syste...equalizer.html
    I know it's old and unsupported version but the new one (from here: http://www.webupd8.org/2013/03/insta...in-system.html) brings crackling. The old one with "Soft" preset makes sound almost perfect but brings another problem: strange volume levels. Quiet sounds are... TOO quiet. For example, quiet beginning of the song. Or whispering. I have to to increase volume to hear these sounds, but when sound must increase just a bit I have to decrease volume because it's getting too loud. Example: http://www.youtube.com/watch?v=34C41eEpM48
    In the beginning of this melody normal volume for me is about 60%. In the end it must be not greater than 40% or I lose hearing.
    Problem wih volume appears only with equalizer enabled. When I disable EQ it's okay, but if I disable it the sound will become muffled. Here is some information that could be important.

    sudo aplay -l:

    **** List of PLAYBACK Hardware Devices ****
    card 0: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
    Subdevices: 1/1
    Subdevice #0: subdevice #0
    card 1: Generic [HD-Audio Generic], device 0: ALC271X Analog [ALC271X Analog]
    Subdevices: 1/1
    Subdevice #0: subdevice #0

    lspci | grep "Audio":

    00:01.1 Audio device: Advanced Micro Devices [AMD] nee ATI Device 9902
    00:14.2 Audio device: Advanced Micro Devices [AMD] Hudson Azalia Controller (rev 01)

    Right now I have almost clear system only wih updates from default repositories and proprietary driver for ATI graphics, I didn't change anything yet. I hope someone can write something that could solve this problem.

    P.S. Sorry if something isn't clear after my explanation. English is not my native language.
    Last edited by charles2; August 4th, 2013 at 02:04 PM.

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