ok.
Fixed the display by adding:
framebuffer_depth=32
framebuffer_ignore_alpha=1
to the config file in the boot folder so now everything looks good.
still getting that issue with error decoding audio when I pick a video or try to launch a Rom with advmame (which works from command prompt)
so i'll keep digging.
Edit: turns out some of my video's have an audio format my whole RPI 2 doesn't like.
I can't play the majority of my game avi's audio with mplayer or VLC.
so that issue is resolved also.
I found the default screen mode "fillscreen" doesn't work when it comes to launching roms on advmame.
Fullscreen works.
so the only new issue I have is I changed my screen resolution to 1280x720 from some oddball resolution and while mame runs better attractmode is now only occupying the bottom left corner of my screen & also runs off the screen.
so I need to play with that now.
almost there.
