I am having trouble enabling audio with MXM. I started using ZXBTools to create a multigame disc and noticed that the audio from the wmv8 videos was not playing. After researching this a bit I learned that you can add <overrides> and <AllowVideoSound> tags into the MXM.xml file to turn on preview audio. I tried various incarnations of that but it didn't work. Then, I attempted to launch several .wmv videos (encoded in WMV8) on the xbox hard drive that I knew were good pc videos and it still didn't play any audio. So, I'm starting to think that it's not MXM but rather my XBOX. Am I missing some files on my xbox that would normally allow me to play (and hear) wmv files? I'm using Unleash X. From what I can tell I'm using the default.xbe that comes with MXM. I've been assuming all along that it supports audio if you enable it with XML.
I shouldn't expect MXM, though, to play videos with audio if the XBOX itself can't. I really need some guidance here.