"I began to feel that I had been spending so much time exploring the upper atmosphere of music and the more ethereal, kind of far-out, spacey stuff. Now there was this need to take some more of the earth and to feel a little more tethered, a connection to the earth. I was beginning to feel that we were playing this heavy kind of music, and I was tired of everything being heavy. I wanted to play something lighter." Those are the words of Herbie Hancock, talking about his seminal jazz-funk album Head Hunters, the subject of this month's Classic Album Sundays listening party; Liquid Sound Lounge's Jeannie Hopper is the presenter.