What do you listen to while you work?

I like to alternate between sounds in the foreground and background sounds. Running water is just lovely, but ocean waves breaking are superb. The laughing sounds of people at play reminds me that life is still very good and valuable. I listen to recorded music for my work as a keyboard player, both intently to learn musical progressions and peripherally to catch the soul of a song. I wish there were lions roaring in the dark, and do not wish to forget frogs croaking all night long.