On the Auro 2d - there are some other settings - any idea what those do?

861v6, Oppo83 (3xSpdif Mod), Wiim Ultra running Squeezelite, Tivo Edge, Apple TV v4 with Key Digtial Audio Extractor, Von Schweikert fronts and center, Triad in ceiling sides and rears, Aerial SW12, Orchard Audio Starkrimson 3 channel and Sunfire Cinema Grand amps