I have a Dell Vostro 5470 notebook. It has three speakers. Two normal and one subwoofer. The subwoofer is not working under elementary os or ubuntu. Windows uses the MaxxAudio 4. Can you help me to fix this problem, please.

Thank you, Kind regards, Tamas Racz

  • open a terminal and write alsamixer, press enter and press F3. Then turn everything up and disable the mute (so that you don't see MM and you only see oo). Does it work now?
    – Maccer
    Nov 16, 2016 at 18:39
  • Hi, thank you for your answear. But it's not working. I mean yeah, but no. So I think the subwoofer is working just the sound is not the best. Like a worst sound. Not as good as windows. I don't know what is the problem. Nov 19, 2016 at 14:12
  • I have three of that what you said. But every three are oo. Nov 19, 2016 at 14:13
  • Try to know which one is the subwoofer and put it to a medium level.
    – Maccer
    Nov 19, 2016 at 14:40
  • Sorry, but it's not the best. The audio quality is not acceptable. :( Dec 5, 2016 at 0:13

1 Answer 1


Add the following at the end of the file:

sudo pantheon-text-editor /usr/share/pulseaudio/alsa-mixer/profile-sets/default.conf

[Mapping analog-surround-21]
device-strings = surround21:%f
channel-map = front-left,front-right,lfe
vpaths-output = analog-output analog-output-lineout analog-output-speaker analog-output-desktop-speaker
priority = 10
direction = output

sudo pantheon-text-editor /usr/share/pulseaudio/alsa-mixer/paths/analog-output.conf.common

[Element PCM]
switch = on
volume = ignore
override-map.1 = all
override-map.2 = all-left,all-right

Then create this file and add that one line.

pantheon-text-editor ~/.config/pulse/daemon.conf

enable-lfe-remixing = yes

Now install this packages sudo apt install cmt blop ladspa-gtk

Lastly, you need to create this file but now you'll have to change alsa_output.pci-0000_00_1b.0.analog-stereo-21 to the output of pactl list sinks | grep Name (Omiting the "Name" word). If you have more than one, ask me first.


load-module module-ladspa-sink  sink_name=ladspa_low_pass master=alsa_output.pci-0000_00_1b.0.analog-stereo-21 plugin=lp4pole_1671 label=lp4pole_fcrcia_oa control=200,0
load-module module-remap-sink   sink_name=remapLFE        master=ladspa_low_pass                               remix=no   channels=1 master_channel_map=lfe                    channel_map=lfe
load-module module-remap-sink   sink_name=remap20         master=alsa_output.pci-0000_00_1b.0.analog-stereo-21 remix=no   channels=2 master_channel_map=front-left,front-right channel_map=front-left,front-right
load-module module-combine-sink sink_name=combine         slaves=remap20,remapLFE                                         channels=3                                           channel_map=front-left,front-right,lfe
set-default-sink combine

Answer taken from here

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