So the setup is as follows. I've got one of those wireless doorbells in which the button is powered by a 9V battery and is stickied to the door and the sound comes from a speaker plugged in a wall socket nearby. ( I use that since I am a student and I change houses a lot) I also have a home stereo system that is quite loud. I have been missing people that ring me or mail deliveries and it's getting kind of frustrating.
My idea is to use a wire of some sort to solder somewhere on the doorbell button, so I can detect the button press via a CP2102 UART USB Adapter I have left off from previous projects, and then send a command to the pc to mute the music playing.
I also have a Raspberry Pi, but I am currently using it as a HTPC, so I wouldn't want to use it.
I would be glad to any suggestions on how I could approach my task.