I have four Play 1s, working in stereo, in 2 rooms. I also have 80s vintage Onlyo TX-840 amp that powers a phono, a CD player, and two sets of hard wired speakers in 2 different rooms. I got a Port and have lined it into the Onkyo, and can now get Sonos content in all 4 rooms. But how do I line the stereo into the Port so I can listen to records and CDs in all four rooms? I get that I could line either the CD player or the phono into the port, but how do I do both? Do I need to get a splitter or something and run cables from the CD and Phono, to the splitter, to the Port and then into the Onkyo amp?