Homey 2.0 missing setting to disable internal speaker?

@Flight777 “Double Voices” is the opposite from “not playing over Line-Out”
or do I not understand you correctly?
What I understand is, that you hear the sound through the Homey-internal-speaker AND, at the same time, through the speaker(s) of your audio system, that is connected to the AUX-connector on Homey.
Sure you have the right to disagree with me, I don’t mind, just trying to be helpful.