ALLPlayer.org

Solution: The problem is Real Player whose own codecs are making a mess in the system.
The best thing to do is uninstall Real Player - then reinstall the latest Real Alternative package manually by checking the entry in LiveUpdate advanced and it should work.

Solution: To resolve this problem you must reinstall the AC3 Filter codec (use LiveUpdate if it comes from there or has been installed together with ALLPlayer, or else uninstall and reinstall ALLPlayer; or use AC3 Filter setup file if it was installed manually with a separate installation file).

Solution: Go to LiveUpdate, check “to delete” -  DirectVobSub.

Solution: Go to sound settings in the AC3Filter:

1. First, check how many channels are in your movie file - (1) - shows that the sound is on all 6 channels; that is OK.
2. Set AS IS (2) in output format.
3. If you have your computer connected to an amplifier with digital or optical connection, select "SPDIF". The sound will not be processed through the computer, but will be sent directly to your amplifier. It greatly improves the quality of sound - (3)

If you do not have Audio 5.1, but stereo instead, you should set the output format to: 2/0 stereo - (1) which will set the sound, like dialogue, to the paths that your equipment is able to play. If you don't do this, many of the sounds corresponding to the channels which you don't have (eg sounds of rear loudspeakers or dialogue) won't be heard or will be scarcely audible.