The sound artist Stephen Vitiello doesn’t always work alone. Often, he brings the world into his work, transforming field recordings into electronically mediated wonders. And sometimes he creates alongside witting collaborators. Up now on his website, stephenvitiello.com, is a segment of score he wrote with Molly Berg for an installation by Eder Santos. No visuals are included, but the sound is deserving of its own audience — light bells, like some digitized wind chime, ring their way through backward masked guitar, rough whistles (suggesting the sound-art equivalent of “outsider” technique), and wisps of less identifiable sounds (MP3).