A group of local new-music advocates has formed New European Music Overseas (NEMO) to introduce Chicagoans to the cutting edge of the European composing community, and its founding on the 50th anniversary of the end of World War II is no coincidence. The war's end ushered in the postserial style and a fascination with newfangled electronic technology that was taken up with a vengeance by Karlheinz Stockhausen in Cologne, Pierre Boulez and Pierre Schaeffer in Paris, Luciano Berio in Milan, Milton Babbitt at Princeton, and Edison Denisov in Moscow. These and other composers will be featured at the first two of three upcoming NEMO concerts. Tristan Murail will be present to talk about his compositions at Tuesday's program, which includes his Vampyr! (1987), a sly homage to the guitar wizardry of Carlos Santana and Eric Clapton, and Le fou a pattes blues, a 1988 piece for flute and piano that pays tribute to Messiaen. The French expatriate Elodie Lauten has the third concert all to herself. Her Tronik Involutions, an assemblage of ambient sounds ordered according to the 12 I Ching modes, will be debuted with the composer at the electronic keyboard. The soloists are all well-regarded interpreters of the 20th-century canon. Monday, 6 PM, Great Room, School of the Art Institute of Chicago, 112 S. Michigan. Tuesday, 5:30 PM, auditorium, Harold Washington Library Center, 400 S. State. Next Saturday, May 13, 6 PM, Festival Hall, Navy Pier, Grand Ave. at the lake. 899-5082.