A system maintains synchrony of operations among devices that have independent clocking arrangements. The system includes a task distribution device that distributes tasks to a synchrony group of devices that perform the tasks distributed by the task distribution device in synchrony. The task distribution device distributes each task to the members of the synchrony group over a network. Each task is associated with a time stamp that indicates a time, relative to a clock maintained by the task distribution device, at which the members of the synchrony group are to execute the task. Each member of the synchrony group periodically obtains an indication of the current time indicated by its clock, determines a time differential between the task distribution device's clock and its respective clock and determines a time at which, according to its respective clock, the time stamp indicates that it is to execute the task.