So could anyone who has a little time think about a solution for that? Main thing is: My door keeps most of the music in my flat so the others dont get annoyed. I thought about a senser at the door which knows if the door is opened or closed. For example if it opens the Music should turn down. I thought about a IR-blaster which mimics the frequency of the remote "MUTE" button or even better puts it just on a lower volume. If the door is closed then it should do the same thing again to play everything at normal volume. I have this idea but sadly dont know how to realize it or which parts i would need.