There is provided an information storage output system enhanced in mobility and improved in convenience to use. The automated transaction machines operate to carry out financial transactions with associated host computers. In accordance with another aspect of the dynamic volume control, an indication that a communications source is about to output data through one or more speakers of a system is received. Further, the electronic device 13 determines whether or not the DCM of each electronic device can be assigned to the electronic devices 11 and 14, in a step S4, and then assigns DCMs which can be possessed by the devices 11 and 14, respectively, in a step S5. According to another aspect, management of podcasts may be facilitated by other mechanisms. The emitted longitudinal wave is propagated to the transport path plate, and a droplet placed on the transport path plate is displaced by the emission pressure.