In his only performance in the region, electronic music pioneer Morton Subotnick will revisit several of his older works tonight at the Museum of Contemporary Art as he performs From Silver Apples of the Moon to A Sky of Cloudless Sulfur IV: LUCY. The program starts with Subotnick’s 1967 album Silver Apples of the Moon, a collection of electronic noises that resemble the sound of a rainforest; it's one of only 300 recordings held by the Library of Congress’s National Register of Recorded Works, and concludes with 1978’s A Sky of Cloudless Sulfur. For the concert, Subotnick will use a new hybrid digital-Buchla “instrument.” “I always start with Silver Apples because that’s the most different from anything I did,” explains Subotnick. “That was really ancient times. It was the first time that anyone ever used a sequencer. I had two two-track tape recorders. The sound quality of the samples aren’t as sophisticated, but it’s interesting because the music still works.” The concert begins at 8 p.m. at the Museum of Contemporary Art. Tickets: $15 for students, $20 for MOCA members and seniors and $25 for non-members. (Niesel)