Can I write a scene that does not change state?

Configuration
,
1

The crux of my question is can I leave the state out of a scene if I only want to change attributes and not the state of a device?
I don’t seem to be able to, at least with the media_player.

I am trying to set a series of volume profiles for multiple speakers (ie Sonos, Bose in my case). i.e Low / Medium / High volume scenes.
I have been trying to do this with scene. But I cannot remove the state: playing from the scene and just set the volume. I am only showing 3 speakers here, I actually have 6 and I they may not all be playing.

Here is the scene, as soon as I remove state: playing the configuration wont compile. and the configuration check yields

Invalid config for [scene]: State for media_player.soundtouch_kitchen should be a string for dictionary value @ data[‘states’][0][‘entities’]. Got None. (See /config/configuration.yaml, line 59).

- id: "1613852807869"
  name: Bose Volume Low
  entities:
    media_player.soundtouch_kitchen:
      volume_level: 0.15
      state: playing
    media_player.soundtouch_kitchen_bar:
      volume_level: 0.22
      state: playing
    media_player.soundtouch_lounge:
      volume_level: 0.20
      state: playing

Here’s the script that does provide a solution. It works well even for devices that a off.
Script also sets an Input number to track the volume preset in the frontend.

soundtouch_volume_low:
  alias: Bose Volume Low
  sequence:
    - service: media_player.volume_set
      data:
        entity_id: media_player.soundtouch_kitchen
        volume_level: 0.15
    - service: media_player.volume_set
      data:
        entity_id: media_player.soundtouch_kitchen_bar
        volume_level: 0.22
    - service: media_player.volume_set
      data:
        entity_id: media_player.soundtouch_lounge
        volume_level: 0.2
    - service: input_number.set_value
      data:
        entity_id: input_number.group_volume
        value: 1
2

Scripts are definitely the way to do this.

Scenes interpret the states you provide to call an appropriate service to set that state. Provide no state and it won’t know what service to call.

3

OK, that explains the reported errors.