Cellist David Geringas plays Osvalda's Balakauskas. With pianist Jascha Nemtsov and others. Mr. Balakauskas (b. 1937)is a distinguished contemporary Lithuanian composer. His highly personal music, strongly flavored by jazz, involves use of serial techniques adapted to diatonic structures. Conductor, cellist and fellow Lithuanian David Geringas has introduced many Russian and Lithuanian avant-garde composers to a western audience.