SONOS volume set in scene

I want to set source and volume for my sonos in a scene and i have tried this
scene:

  • name: Musik
    entities:
    media_player.stue:
    source: Retro Radio
    volume_level: 0.4

Have also tried volume_set.

Setting source Works fine but nothing happens to the volume. What is the right syntax?

This is how my automation looks for setting the volume:

  action:
    - service: media_player.volume_set
      data_template:
        entity_id: media_player.wohnzimmer
        volume_level: 0.14

But in scenes it might be a little different.
Actually, did you try setting only the volume instead of doing it combined with the source?

Now I have tried only volume_level: 0.4 and it Works fine alone.
So I guess there must some other way the scene should be defined…

my scene looks like this:
scene:

  • name: Musik
    entities:
    media_player.kkken:
    volume_level: 0.1
    source: Retro Radio

Only one of the two Things happen. If I # one of the lines it Works fine,
Someone know how to write the syntax instead?

Did you try something like this?

scene:
  - name: Musik
    entities:
      media_player.kkken:
        volume_level: 0.1
      media_player.kkken:
        source: Retro Radio

yes tried this and something like it but it returns an error. :-/