Hello, the best solution (to my opinion) is the Almando Multiplay Surround Decoder II. This one has a build in WISA module. (https://almando.com/almando-multiplay-surround-decoder-78.html)

I have this decoder connected to my Samsung TV and works like a charm. All my B&O speakers work in full surround mode. Unfortunately the web page is in German, but if you give them a call the can explain everything in English. The instruction manual is in English.

Carolpa wrote:

But that was not the initial question: it reads, imo, can I solve the wisa connections by adding a Core

Very nice the soundset! did not know this product. In my situation I had to connect a Beolab 7.1, Beolab 2 and the Wisa speakers. So the only solution was the Almando. (as fas as I know). Indeed the Alamando is not cheap.

Thanks for all the suggestions. 

I have an existing setup using the transmitter and Beosound essence MKI connected to the TV.

I don’t like the setup and somehow it doesn’t always work and thought the core might be a better option.

the  Almando Multiplay Surround Decoder II does seem like a better alternative. Will look into it. 

Not sure if this works but for the not Wisa enabled speaker you could use a WISA receiver. I have four of hem for my back speakers (BL3). If this makes sense form a budget point of view might me a diffeent question.

But also seeing the pricepoint and size of the device from the Wisa organization, it can not be that hard to integrate it into a stage.