I have a problem with Windows Media Player that has recently surfaced whereby when I watch films on it (doesn't apply to CDs or DVDs of TV shows) background noise, such as dogs barking or music can be heard and sound effects on the menu also, but the characters speech is never heard, similar, I think to the sound settings when played with commentary. This problem started when I watched a film with the commentary, and since, only with films have I been unable to hear the characters speak.
On the film I watched with commentary, I can get normal audio back by selecting, on Audio Options on the DVD's menu 'English 2.0 Dolby Surround', but this is the only film I have that gives a choice of audio settings, so so far, this is the only film I can watch with proper sound.
To me, it seems that watching the commentary version has caused Media Player to get stuck on the commentary sound setting, just without the actual commentary, since it only seems to effect films (which all have commentary). If anyone can offer any help with this problem it would be much appreciated.