Circuit to eliminate Dead Air

Thanks Neil; Buying the Audio/video switch box certainly made it easier.  I was dreading having to drill the holes in a box, install the RCA plugs and hook up the rat's nest of wire's to my circuit card.  When I opened of the Switch box, and saw the ribbon cable connecting the RCA plugs and the switching mechinism, I got the idea to just use the existing ribbon cable to connect everything together.

I will post the updated schematic when I get a chance. Seems to be working fine with a single 15 VDC supply and creating the fake ground at 7.5 volts.