Abstract: A digital music system according to the present disclosure is a single processor system with a drag and drop interface that permits different digital content to be performed simultaneously in two or more performance zones. The user interface may be further optimized for use with a touchscreen display. Each performance zone may have a performance queue independent of other performance zones. Performance queues may be altered at any time during a performance. Transition between each item of digital content in a performance queue is accomplished using a crossfade with user-defined parameters. Additionally, a user in either performance zone may identify a digital content item for preview and the preview may be accomplished while the music management system is performing digital content in the two or more zones.