Sound proofing listening room

My listening room is in the basement. My problem is that my wife above can hear too much, always telling me to turn it down, I was wandering if anybody has any cheap ideas to help keep the music in my basement.I do know the the space between the ceiling and floor are not insulated and I'm planning on doing that. But I'd like to do more. Treatment for the ceiling in my room is ok. Anything is ok cause it is my room to do with what i want. So I welcome all suggestions.