Abstract
Personal Orchestra lets anybody conduct an electronic orchestra at a new level of realism:users interact not with a synthetic,but an original audio and video recording of a real orchestra - the Vienna Philharmonic.Nevertheless, they can interactively control not only volume and instrumentation,but also tempo of the orchestra,using natural conducting gestures.A gesture-tracking and -predicting algorithm interprets user input,and a high-.delity playback algorithm renders audio and video at variable speed without time-stretching artifacts such as pitch changes.The system was designed following a set of user interface design patterns for interactive exhibits.It is being used as the "Virtual Conductor" exhibit in the HOUSE OF MUSIC VIENNA by hundreds of visitors every day.