Hi, I am using this for my home cinema setup, and 2 Calliope speakers as my rear speakers for a 5.1 surround system. However, I would also like to attach a Sonos Connect to the AVR32, and then use these 'back speakers'. However, I can't seemingly configure the unit to use the back speaker (for the Tape in) only the front speakers. Any ideas on how or if I can do this? Thanks.