When listening to content with the A16, you can cycle through 1 of 16 presets of speakers. If you want to use a stereo speaker setup all you have to do is select one that you’ve made. Same with 5.1. From what I can tell using it last night the Realiser will not select for you. It doesn’t see that the signal coming in is and automatically select one of you setups with 2 speakers. It defaults to whatever the last preset you were using was. Each preset has a spot to pick which room to use for Dolby, DTS:X (even though it can’t decide it yet), and PCM content. So for example you could have your preset #1 use a 9.1.6 room if it detects a Dolby signal, but if it’s being fed PCM you can have that preset use a 7.1 room.