Does k9copy allow you to also compress the audio when you're mastering a DVD? (i.e. creating a full directory structure with chapter stops and menus ready to be burned into a DVD)

My objective is to reduce audio quality in order to maximize the video quality, and this particular DVD I want to compress doesn't have a 2.0 audio track. So want to do is to take the 5.1 audio track and reduce it to 2.0, is that even possible with k9copy?