Does the B&O app allow the creation of playlists across music streamning sources at the same time (i.e. track no. 1 is pulled from Deezer, track no. 2 is pulled from Apple Music, etc.)? If not, I believe that the Sonos app provides this functionality. Will I be able to stream from the Sonos app directly to Beolab 18/19, or do I need some Sonos hardware for the Sonos app to work – if so, then I guess the play doesn’t work…?