I have a recently-purchased Wiim Pro connected to an older Pioneer receiver and I have a Sonos Era 100 connected via wifi in a different room. I can get audio simultaneously from an app on phone to both the speakers connected to the Pioneer receiver and to the Sonos speaker. I can play from CD or vinyl to EITHER speakers attached to Pioneer receiver OR to Sonos Era 100, but not to both simultaneously. Wiim App only lets me select either Line Out or AirPlay receiver, not both at the same time. Is it possible to output from Line In to Line Out and AirPlay receiver at the same time? If so, what am I doing wrong? Thanks!