Setting up MC200 with 500 series equipment comms. (565/518 but applies to all 500 series kit) You will need a suitable cable, AC12 or Reviver to make connection.
Set up your Sooloos input on MSR+ inputs 1, 2, or 3 only (left to right on the remote) (on the old MSR you may be able to use any input. Experiment.) Failure to do this will mean you have to press Function with any command you want.

On the both 565 and 518 (or 562) set comms to 4C on the Sooloos inputs. I have labeled the 518/565 input jukebox. (choose what you like)
Plug your comms lead (comms only) or AC12/ Reviver into the processor and not any other equipment or you will not get the correct response.
Turn on all equipment connected via comms, select CD on the MSR+ then press/hold clear and check you only have one controller. (as described in set up manual) Do this anytime you have adjusted anything.

Set the config program for Sooloos on your PC to enable comms and tell it the input number you have chosen for Sooloos. Limit the output frequency if your equipment cannot handle 96 KHz signals.
You will now have control via MSR/MSR+ of Play, Stop, Pause, Track Forward and Reverse. Just pressing play on the media core app will turn on your equipment. You will also have volume control of your system via the app and the numbers will coincide.

Selecting Sooloos on the MSR and pressing play will start your Sooloos playlist (if loaded) without the app. Turning off your system will stop Sooloos playing as well.
Display will not turn off the Intense LED on MC200

Is the comms expansion box 511, I think, useful here?
If I remember correctly the 565 had more comms sockets.

Hi Chris, 565 had more comms but for speakers

What you may be able to do, and I stress, I have not tried it with MC200 is to use the other comms port and expand that with 240 DIN sockets, one which will accommodate your master speaker, the other sockets could be used for other Meridian legacy equipment.