5.1 Soundsystem - How to move LFE only to the Subwoofer?

Solution 1:

There is an option for lfe-crossover-freq= in pulse-daemon.conf.

Here's what man pulse-daemon.conf says about it:

   lfe-crossover-freq=  The  crossover  frequency  (in Hz) for the LFE filter. Set it to 0 to
   disable the LFE filter. Defaults to 0.

Instead of altering the settings under /etc/, I'd recommend that you copy these files to your user's home folder. (If you've already changed them, copy from your backup of the original files):

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

Add the following line to ~/.config/pulse/default.pa:

load-module module-combine channels=6 channel_map=front-left,front-right,rear-left,rear-right,front-center,lfe

Add (or uncomment) the following lines in ~/.config/pulse/daemon.conf:

remixing-produce-lfe = yes
remixing-consume-lfe = yes
lfe-crossover-freq = value

Replace value with the desired crossover frequency (in Hz). Frequencies below this value will be sent to the LFE channel.

Restart pulse with pulseaudio -k.