Morphine leader Mark Sandman was the inventor of a sound called "low rock" — the distinctive blend of sonorous saxophone, bass and deep grooves that, along with Mark’s lyric poetry, propelled Morphine to fame. But Mark created much more than the brilliant music of Morphine. He was a tireless musical experimenter who wrote and recorded constantly throughout his life. Although Morphine and the seminal swamp-blues quartet Treat Her Right became well known and successful, much of his work was never commercially released and remains unheard — except by his large circle of friends, who he regularly commandeered to critique his latest, usually over a bottle of Patron.