View Full Version : [ubuntu] How to deactivate 5.1 upmix for stereo sources

August 26th, 2010, 07:47 PM

I've got a stock amd64 ubuntu 10.04 install and everything works great. I've got a 5.1 soundcard and speaker system and while it's great for DVD and other 5.1 audio sources, I don't like my stereo sources to be upmixed to 5.1.
I've searched this forum for "upmix" and all I have found is old threads to activate upmixing from 2.0 to 5.1. With 10.04 it's already upmixed and I didn't found how to keep 2.0 sound to the front speakers (while keeping 5.1 sound to my 5+1 speakers).

I welcome any input.

Ps: forget my French, I'm English (or maybe the other way around)

August 27th, 2010, 11:41 AM

August 27th, 2010, 04:08 PM
You might try disabling upmixing in /etc/pulse/daemon.conf so that only native 5.1 apps produce surround sound.

gksu gedit /etc/pulse/daemon.conf
Find line that says:

; enable-remixing = yes
Change to -->

enable-remixing = no
Save. Quit. Kill pulseaudio to restart it (or log out and log in)

pulseaudio --kill

September 2nd, 2010, 12:06 PM
Thank's it's exactly what I want.