Suddenly, MOCA's got an exhibition schedule again. It looks as ambitious as ever. Planned through 2012 are Geffen-sized surveys of land art and Latin American light and space; retrospectives of William Leavitt, Jack Goldstein, and Mike Kelley (not to mention Arshile Gorky, previously announced). Among the quirkier choices is "Iannis Xenakis: Composer, Architect, Visionary," to be shown at the Pacific Design Center. Xenakis started as an assistant to Le Courbusier and became a math-obsessed composer, John Cage with a twist of Alfred Jensen. Among his creations was UPIC, a computer that converted visual images to sound (the idea is the opposite of the sort of synesthesia that intrigued Kandinsky, and which was the subject of MOCA's 2005 "Visual Music.") Much of Xenakis' music is available online. Below is his Metastasis.