There seems to be an inherent problem with PowerDVD 11 audio. Dolby Headphones doesn't work even though you set it up right in the option menu. You will hear sound but the sound is a regular audio, not Dolby Headphones.

Moreover, sometimes I can't hear anything. I have to change the audio setting, stop the player and turn it back on, and undo the change. This will bring the audio back on but again Dolby Headphones doesn't work.

Never had this problem before with PowerDVD 10.