Hello Rob, yes I do have the attic's BS5/BM5 connected to a BLC, it is in A.Slave mode (and it plays some AudioSlave too sometimes!).

While I am listening to BeoSound 5 MOTS music (Chili Peppers) in the kitchen (BeoLab 4000s connected to another BLC - A.Master - with IR eye) I can't say you can really instruct the playback of MOTS music with a command. You select music on the BS5 (or with a colored Be04 button) and when that queue has ended, the BS5 will continue to play songs that are more of the same. The Red Hot Chili Peppers are apparently more of the same as The Offspring's L.A.P.D :-). Having said that, when I hold the 'GO' button on my older Beo4 for some time, still in the kitchen, the music stops for a moment, to let me know this song is now the 'seed'. I tested it by playing an album halfway through, and after a long 'GO' press the BS5 indeed moves to MOTS and plays similar songs. So you could say that is a way to 'activate' MOTS.

I am not sure this all just works because of the BLC behaving as a MasterLink unit. I do not have a true NL speaker to test this with. Maybe Carolpa will chime in?

Regards, Johan