Bill Martin is professor of philosophy emeritus from DePaul University.  He is aiming to go from retired professor to renewed philosopher, and also to devote a good deal of time to making music.  After twenty-eight years in Chicago, he now lives full-time in Salina, Kansas.  His most recent book is Ethical Marxism: The Categorical Imperative of Liberation.  He is also a musician, and has now released four albums of experimental music in his “Avant-Bass” series, most recently Raga Chaturanga (Avant-Bass 3) and Emptiness, Garden: String Quartets (Avant-Bass 4).