I would like to have the microphone input of my Audya 5 permanently on, no matter what registration I use. How can I manage this? Thanks for every answer.

Try switching your mic on , then save as start-up

I think you have to remove the dots from the micro and Voicetron in all your registrations as these are included in the factory settings when saving registrations.And remember pressing user 1/6 button before saving the next registration because it recalls the changes you have made.