What is stt in the startup log?

lately I see this:

2019-12-18 14:10:18 INFO (MainThread) [homeassistant.setup] Setting up stt
2019-12-18 14:10:18 INFO (MainThread) [homeassistant.setup] Setup of domain stt took 0.0 seconds.

searched for integrations but none use that in the https://www.home-assistant.io/components/

Nothing in my configuration.yaml referring to stt, or default_config: (which I don’t use btw)

I do have tts :wink:

any knows what this is about?

This is for the speech-to-text integration:

ok Thanks!
so this gets loaded without any hints to the needs for it? Don’t know if it actually uses resources, but since I don’t use speech to text, it doesn’t seem necessary?