Abstract: Rehearsal mixes are provided for transport by disclosed methods, services, and computer programs. Transported rehearsal mixes include one or more music tracks that are at an adjusted (e.g., higher or lower) sound level compared to sound levels of other music tracks to emphasize or de-emphasize a part that a musician is required to learn, for example. Disclosed embodiments may include, communicate with, or be integrated with automated planning systems for automatically providing rehearsal mixes to musicians in response to the musicians indicating their planned participation in a performance or rehearsal. Backing tracks may be automatically provided to a music director if there is an unfilled need for a live musician at a planned performance.