Great post a little while ago for something that I couldn't figure out. How to trigger a custom sound on a smart speaker. In the video just posted Pete shows how to do it using Rule machine and a sonos. I don't have a sonos and am using an echo device. The echo says "I can find the song" that I uploaded to the hub and copied the link from.
Maybe this is only possible with sonos speakers and not smart speakers like echo or google devices for some reason?