I have included a video of super mario demo screen so you can see and hear how awful it is. The audio sounds awful, like it is strained and barley able to produce it properly.
The image looks Pixilated and the colors look off, and the image is not full screen.
I originally installed retropie 1.9.1 and I did not have any problems with the image or the audio. The image looked great with RP 1.9.1, and it was full screen. The audio sounded like the original game, no funny sound issues at all.