To say I'm not familiar with A/V equipment, audio codecs and the like would be an understatement. I've been using Mp4Tools for a while, but am not sure this whole time if I've been selecting the proper settings. I'm looking for the best settings for playback on both an ATV3 and an iPad. At this time, I do not have any type of 5.1 Setup on my TV, but would like to future proof the files for when I do. Attached is a screenshot, with some settings. I know I need to select AAC 2-channel for proper iPad playback, but do I also need to select AC3 5.1 for eventual playback over an A/V setup on a TV? Or will the AC3 6channel playback properly on a 5.1 surround sound system? Also, are the kbps settings correct? I just want to make sure I have the proper settings, and am not being redundant in the selections. Thank you.