It's rare to find contemporary fare on classical radio these days, but Rob Deemer, based in Oklahoma City, has launched a weekly series called Composer Next Door on local station KCSC. Currently he's leading listeners on a "whirlwind tour" of music from various American regions: tomorrow's California show, typically eclectic, brings works by Pauline Oliveros, John Williams, Alex Shapiro, Morten Lauridsen, John Adams, and Per Bloland.... As part of Miller Theatre's Organ Festival, John Scott plays a free program of Ligeti and Jonathan Harvey at St. Thomas Church on Sunday at 5:15PM. Be prepared for some deliciously shocking sounds.... Sunday in San Francisco, a rare performance of Stockhausen's Hymnen (tape version) at the San Francisco Tape Music Festival.... Peruvian clarinetist Marco Mazzini is hosting an online competition for the most creative interpretation of Juan María Solare's free-tempo piece Convalacencia.... Jason Freeman's piece Graph Theory allows the listener to navigate among various optional modules of a score for solo violin, and your choices affect future performances of the piece.... Take note of Formerly Known As Classical, the Bay Area teen-aged new-music ensemble. One recent program was entitled Since We've Been Born, and featured music written since [gulp] 1988.