I listen to music at least 12 or 13 hours a day, if it's a weekday. We listen to satellite radio at work and I work 10 hour shifts, plus I enjoy listening to music while posting on websites. 🙂
As an active musician I listen to music for the majority of the day either in my recording studio or when I'm out jogging and at times when most people are watching TV.
I think probably somewhere in the region of 2-3 hours as I’ve always got music on for my commute too and from worn and then always in the kitchen if I’m cooking or cleaning up.
My day is incomplete without music. It reminds me that life is worth living, and so I need to push through no matter what. It might be for so long, but I must listen to some songs every day.