Alexa Automation with sound

Configuration
1

I have 4 Echo Devices throughout the house. I have created some reminders to put out the trash, feed the dog, etc.

But now I am having trouble that I do not know how to overcome.

I would like to play an mp3 file to get my attention before the announcement of lets say put out the trash. Out of a dozen plus posts on how to add an mp3 there are 5 different methods. Tried them all and get an error saying that the device can not play a file that is not TTS.

I also want to include all my echos to do this. I have created a echo group called group.echo.
How can I incorporate this into a somewhat streamlined automation.
Here is the automation that I created that works.

Any help from the group would be greatly appreciated.

- id: '1591905569067'
  alias: Trash Day Black Barrel Early Pick Up Reminder
  description: Trash Day Black Barrel Early Pick Up Reminder
  trigger:
  - at: '16:00:00'
    platform: time
  condition:
  - condition: time
    weekday: mon
  action:
  - data:
      entity_id: media_player.echo_show_8_office
      media_content_id: amzn_sfx_trumpet_bugle_04
      media_content_type: sound
    service: media_player.play_media
  - data:
      message: Put Out The Black Barrel
      title: Put Out The Black Barrel For Tuesday Pick Up
    service: notify.carlton
  - data:
      data:
      message: Put Out The Black Barrel
      photo:
        caption: Take the black trash barrel to the curb
        url: https://NOTMYADDRESS.ui.nabu.casa/local/images/black_barrel.jpg
      title: Put Out The Black Barrel For Tuesday Pick Up
    service: notify.telegram_carlton
  - data:
      data:
        type: tts
      message: This is a Reminder to Put Out The Black Barrel For Tuesday Pick Up
    service: notify.alexa_media_echo_show_8_office
  - data:
      data:
        type: tts
      message: This is a Reminder to Put Out The Black Barrel For Tuesday Pick Up
    service: notify.alexa_media_echo_greatroom
  - data:
      data:
        type: tts
      message: This is a Reminder to Put Out The Black Barrel For Tuesday Pick Up
    service: notify.alexa_media_echo_bedroom
  - data:
      data:
        type: tts
      message: This is a Reminder to Put Out The Black Barrel For Tuesday Pick Up
    service: notify.alexa_media_echo_garage
  mode: single