Berkleemusic.com, the online extension school of Berklee College of Music, will present a new online course in Apple’s GarageBand audio editing program, this fall, the school announced at this week’s Macworld Conference & Expo in Boston. Instead of focusing on the technical and strictly functional aspects of GarageBand, the online course is structured to allow students to learn and apply Berklee’s writing, arranging, and production techniques to GarageBand.