switch from DVD to TV) - change the MultiEQ setting (ie. turn off Audyssey) - toggle mute - power the main zone & zone 2 on or off This app supports only receivers made by Denon & Marantz that have an IP address, and are listening on port 23. In practice this translates to receivers made from roughly 2013 onwards. Although this app has functionality designed to prevent you from accidentally turning your receiver up too loud, no software is perfect: by using this app you assume all responsibility for the volume levels & other functions set on your receiver, including those set by this app.