mp3 sounds for use with the "alarm" feature of your home assistant device
With the addon "file editor" of your "home assistant" leave the mp3 files in the path /homeassistant/www/audio
To play them create a script that calls the media player service with the option to play media content. Choose your device (tablet, google home...) and the path where these mp3 sounds are located.
The path of the sounds is written like this: https://pepe.duckdns.org:8111/local/audio/alarma_la_alarma_esta_armada.mp3