Tigger for an automation when a tts_output is released

Hi Folks,

i get everything working with assist with Voice run smoothly so far :slight_smile: But know i need a bit of support now. I like to create an automation get trigger when “tts_output” is active, but i can’t find one … Mean if the audio is sent to my speaker. I like to send a MQTT out when that happens to trigger a LED Ring.

Does anyone have an idea ?