How do I set up a single-source multi-room arrangement?

[dvdcsmth]

This is a newbie question, but it's about a basic issue a quick search does not find discussed, at least not in the checklist fashion I'd probably find most useful.

I have two pro units, one wired (line in/out) to each of two stereo systems.

How can I send a single stream of music (usually from qobuz, in my case) to both systems simultaneously?

 

[Mr Ee]

Wiim home app, devices screen, press the paperclip like icon on the top right of the one you're playing music to.
Choose the other one to create a group.

 

[dvdcsmth]

Perfect answer. Thank you so much.

 

[Brown Sound]

Wiim home app, devices screen, press the paperclip like icon on the top right of the one you're playing music to.
Choose the other one to create a group.

Nice! And no one rudely slammed you, like the other night, eh? Glad some folks really want help.

 

[Mr Ee]

Nice! And no one rudely slammed you, like the other night, eh? Glad some folks really want help.

Well, no one likes an answer they don't really want to hear. It's all good, I'm resilient

 

[Brantome]

Well, no one likes an answer they don't really want to hear. It's all good, I'm resilient

Plus everyone is free to report a post that they feel is out of line, but by and large we’re well behaved as well as resilient in the group