Your question is a bit vague.
The obvious answer is using the volume control. If this is controlled via a remote control, then that would answer you question.
Wireless speakers are available and B&O manufacture systems that can be controlled from any room in the house, but I am speculating here on your actual needs.
If on the other hand, you are talking about muting music emanating from someone else's music system - whatever that may be, then I don't know of anything available that would satisfy your needs.
Try rephrasing the question and being more specific.