Muse and HA as a Voicee Assistant deevice

Hi,
found a .yaml in a forum discussion (Home Assistant Wakeword with Muse Proto HELP - #7 by Macho_Smallface), looks fine. I (as an newbe) understand how to adatpt the file for my box.

Unfortunately, there is an error in the yaml, or some incompatibility beetween versions:

I probably know now, how to adapt the box with a new .yaml, but didn’t understand how to use this ‘substitution’ clause in thee file you privided.

With best regards

Gerhard