One of the greatest thrills for the serious music fan is to discover a new work, something that expands both your collection and your range as a listener. There are few better opportunities to do this than todays Music by Living American/Houston Composersconcert, co-hosted by the Houston Composers Alliance and the University of St. Thomass music department. Local musicians will cover a variety of styles as they perform the works, which include Paul Englishs 2007 Musaic, performed by the Trio Angelico; the American premiere of Arthur Gottschalks Rotating Hexachords: A Grand Rag-Tango for Solo Piano, performed by Kris Becker; and one of the evenings three world premieres, Reynaldo Ochoas Dancing Lights at Waters Edge, performed by pianist Jasmine Hatem. Expand your horizons by staying local. 7:30 p.m. Cullen Hall, University of St. Thomas, 4001 Mt. Vernon. For information, call 713-665-8877 or visit www.houstoncomposersalliance.com. $10.