When i'm playing a 5.1 movie, i only hear left and right channel. When there's sound from a rear channel, i hear absolutely nothing.
How do i set VLC to convert 5.1 to stereo, so that no sounds are missing?
PS I use PulseAudio.
The two ways I have found until now are:
http://www.hydrogenaud.io/forums/index.php?showtopic=104214 shows that it is not possible to automatically downmix something with perfect quality - it seems that an audio engineer who corrects the volume of each channel is needed in some cases like yours.
I'm using the WaveOut audio output under Preferences > All (Advanced) > Audio > Output Modules.
Disable Dolby Surround in Preferences > Audio > Dolby Surround to Off, and uncheck Headphone surround effect, if checked.
Under Preferences > All (Advanced) > Audio > Output Modules > WaveOut > set the Audio output channels to 2.
Save and restart VLC.
Please note that Disabling Dolby Surround didn't have any effect, but changing the output channels down to 2 did, so I left it off.