I use the PC setup above... Its a local command, or it works as such. The signal is not passed to Masterlink I don't think. Great for Turntables etc..
You are up against it. Masterlink would have to be re-written or engineered back to allow for multi room master setups. Kind of 2 way communication.Its rumoured that is the way it was designed so it may not be that difficult.
Although the signaling could possibly be altered if B&O choose to do so there are other problems. Mainly the limitation of the number of audio and video signals passed room to room via ML, and RF which is 2. There are other problems such a registering link devices to make them addressable with B&O's option list, remote control commands options etc etc..
I have tried to go down this path before.
Personally I wish B&O would produce a "Link Room Master Converter". ...Configured at option 12 it would allow remote devices to be brought into the B&O link system model. Oops, the wine is working now...
Over to others.
Beoaus.