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Thread: How to: Mono sound for Single Speaker Acer Laptops

  1. #1
    Join Date
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    Ubuntu 11.04 Natty Narwhal

    How to: Mono sound for Single Speaker Acer Laptops

    Hi all,

    For everyone running ubuntu on a laptop with a stereo audio adapter but only one built-in speaker, like the Acer Aspire series, here's how you create a mono profile so you can hear both channels through the single built-in speaker:

    In Terminal run:
    Code:
    $ pacmd
    at the prompt enter:
    Code:
    >>> list-sinks
    Note your main sink's name so you can inset it into the following code:
    Code:
    >>> load-module module-remap-sink sink_name=mono master=[YOUR MAIN SINK'S NAME] channels=2 channel_map=mono,mono
    If you have entered the command correctly, you should be returned to the >>> prompt. Do not exit at this time.

    Open Sound Preferences and chose "Remapped Internal Analog Stereo Mono"

    You may want to reduce the master volume to prevent audio clipping.

    The Mono setting will last as long as pacmd is running in Terminal. To make it permanent, add the command to the end of /etc/pulse/default.pa.

    Hope this helps you enjoy ubuntu on your laptop.

    nolo
    Last edited by nolo; February 26th, 2011 at 08:06 PM.

  2. #2
    Join Date
    Feb 2011
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    Re: How to: Mono sound for Single Speaker Acer Laptops

    can you please walk me through this step i cant seem to figure it out, i get ikt to work by running pacmd and everything but cant figure out how to edit that file an" :/

    "The Mono setting will last as long as pacmd is running in Terminal. To make it permanent, add the command to the end of /etc/pulse/default.pa."

  3. #3
    Join Date
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    14
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: How to: Mono sound for Single Speaker Acer Laptops

    In Terminal enter:
    Code:
    $ sudo gedit /etc/pulse/default.pa
    Position your cursor at the end of the file and add the command:
    Code:
    load-module module-remap-sink sink_name=mono master=[YOUR MAIN SINK'S NAME] channels=2 channel_map=mono,mono
    Then save the file in gedit.

    This will make the mono setting a permanent choice under Sound Preferences.

    Good luck.

    Nolo

  4. #4
    Join Date
    Feb 2011
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    Re: How to: Mono sound for Single Speaker Acer Laptops

    It seems to have worked except for oen thing, if i turn my volume up even remotely high there is major cracking etc. i have to have the volume so low i can barely hear it. any way to fix this?

  5. #5
    Join Date
    Feb 2011
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    4

    Re: How to: Mono sound for Single Speaker Acer Laptops

    got never mind thanks so much

  6. #6
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    Feb 2011
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    Re: How to: Mono sound for Single Speaker Acer Laptops

    its happening again. any way to fix the crackling?

  7. #7
    Join Date
    Feb 2009
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    Re: How to: Mono sound for Single Speaker Acer Laptops

    Hello.

    I have a packard bell with a similar set up - single speaker.

    I have tried following the guide above but it has had no effect on the sound - im still only getting one channel of audio.

    Can anyone offer any guidance?


    Cheers

    EDIT: Got it working but like others I have terrible crackling and popping. I guess nobody has a fix for that?
    Last edited by Sylos; December 7th, 2011 at 01:58 PM.

  8. #8
    Join Date
    Aug 2012
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    Re: How to: Mono sound for Single Speaker Acer Laptops

    I know this is an old thread, but I've had this problem too. these instructions are still valid in 12.10 and as for the "crackling" people still have after using these settings, my solution is to switch back to the NON remapped stream in Gnome sound settings, turn the volume on that up to say 105% then switch back to the remapped stream and turn the volume up just a bit or lower, it allows you to have louder volume before it starts to crack.

  9. #9
    Join Date
    Feb 2008
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    Texas
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    14,730
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    Ubuntu 12.04 Precise Pangolin

    Re: How to: Mono sound for Single Speaker Acer Laptops

    Thanks for sharing and please do not post in threads that have not had activity for a year or longer, since this is an old thread it has been closed.

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