Home Assistant Script

Find the sound you want from the Alexa Sounds Library and copy the url.

Select the notify.alexa_<your echo> as the service and paste in the url to the message and add a data->type of tts

service: notify.yourEcho
  message: *** your chosen audio sound html ***
    type: tts
<audio src="soundbank://soundlibrary/air/fire_extinguisher/fire_extinguisher_01"/>