Has anyone else experienced a lack of menu volume control for some DVDs/video files. I use one of the PS Soundbars for my audio setup connected with an optical cable. I've noticed with some movies that the on screen volume control does not do anything. The soundbar does have a remote so it's not the end of the world, but I like to leave it a set level and just use my dvd remote to make minimal adjustments. Does anyone know what the cause/solution may be? I'm pretty sure I have the right settings enabled. Thanks in advance.