Roon send music to a group of speakers

Configuration
1

I know I can group audio in Roon, but is that possible using the integration?

If I choose multiple speakers playing random music, all speakers are playing random but different titles.

I am new to Roon, so maybe I am missing something.

Thanks

2

It is actually implemented in the media_Player entity:

action: media_player.join
target:
  entity_id: media_player.test
data:
  group_members:
    - media_player.additional