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Slaus
Asked: 2018-06-05 07:58:39 +0800 CST

Tune sound remixing

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My PC sound outputs to 5.1 sound system with subwoofer being able to play 45 Hz and more frequencies only. Some songs and movies was "looking" weird with portions being distorted or silent. I think I figured out what is the reason: when sound is intended to be within 20-45 Hz, it just doesn't come out. In this video, the whole second part of it is completely silent for me: https://www.youtube.com/watch?v=M8gjsefNYpE - which exactly corresponds to my speakers specs.

Is there a way to remix 20-45 Hz to 46 Hz or something with alsa/pulseaudio? Or any other way to solve this problem? Besides spending 3k$ on new sound system ;)

sound pulseaudio alsa

3 Answers

  1. Pulseaudio has settings for lfe remixing

    To safely customise Pulseaudio settings, copy default settings file to home folder

    cp /etc/daemon.conf ~/.config/pulse/daemon.conf

    Only need to edit the new file to change settings and don't need sudo. Home folder settings are used instead of original settings, but if something doesn't work can delete new settings file and restart Pulseaudio with default settings

    Open file ~/.config/pulse/daemon.conf find this section:

    ; enable-remixing = yes
; remixing-use-all-sink-channels = yes
; enable-lfe-remixing = no
; lfe-crossover-freq = 0

    these settings are disabled by default delete the semicolon ";" at beginning of each line to enable setting

    Can't advise exact settings you would need, but there should be a combination of these 4 to suit your needs

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  2. Best Answer

    If your speaker can not play a certain frequency range you have to live with that or change the speaker. It can make sense to filter out those frequencies under certain circumstances.

    However, your idea of "folding" the lower frequencies up into the reproducible range would result in unpleasant and distorted noise which likely was not intended by the producer of said pieces of sound.

    You seem to forget the frequency corresponds to perceived pitch of a tone, it's not just a secondary quality of it.

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  3. This could help too ... :

    There are additional drivers in different music packages.

    So you could install (--reinstall) packages rhythmbox and amarok.

    sudo apt-get install rhythmbox amarok

    or if they are already installed, then:

    sudo apt-get install --reinstall rhythmbox amarok

    This helped in other similiar situations, where had been trouble with sound output.

    Then do

    reboot

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