Known for its imaginative and playful programming, Master Chorus Eastside has set its sights on the sound worlds of the mysterious, otherworldly and wacky for Sound Imaginarium: Things That Go Bump in the Night. Ghoulies, ghosties and long-leggedy beasties are all on tap for the evening as one of the premier arts organizations east of Seattle performs Eric Whitacre's Cloudburst, complete with bass drum and thunder sheet, David Brunner's Jabberwocky and a new work by artistic director Dr. Linda Gingrich, set to the words of an old Scottish prayer, at First Presbyterian Church of Bellevue.