MARCHmusic28 GRAND OPERA FESTIVAL - Symphony Society of Sar. Antonio, Victor Alessandro, Conductor, 'theater For The Performing Arts, 5 p.m. — TRISTAN UND ISOLDE. S3.50 to $15.00, 22G-2269. ‘APRIL2,5,7 SIUDENTCONCERTS — Symphony Society of San Antonio, Theater For The Performing Arts, 9:39 and 10:45 a.m., admission charge, 22G-2269,3 COLLEGIATE CHORALE — Thcron Kirk, conductor; Marinchi Mass, San Antonio College. McAllister Auditorium, 1400 San Pedro, 8p.m., Si, 734-5381, ext. 24G.4 VOICE RECITAL BY DIANNE CLAFFEY —Incarnate Word College, Palestrina Hall, Broadway at Hildebrand, 4 p.m., free. S2G-32D2, ext. 37.5 UNIVERSITY COMMUNITY CHOIR — TrinityUniversity,Taylor Concert Hall, 715 Stadium, 8pm free, 736-4141, ext. 305.1 GRAND FUNK RAILROAD — presented by Concerts West, Convention Cnnler Arena, 7:30 p.m., 225'7998.8, 10 HOUSTON BALLET — Theater For ThePerforming Arts, 8:30 p.m., admission charge, 226-^ *• w ■