Patent ID: 8312375

Claim:
A digital mixer for processing a plurality of audio signals via a plurality of channels and mixing the audio signals, the digital mixer comprising: an operation panel including a display that displays a current screen selected among a plurality of screens for setting the processing of the audio signals via the channels, a plurality of select buttons corresponding to a plurality of screen groups respectively, said screens grouped into said screen groups, and a home button; a memory that stores a plurality of screen specifying data corresponding to the plural screen groups respectively, the screen specifying data of each screen group indicating one screen selected among the plural screens belonging to the screen group, home data indicating one of the select buttons, and current group data indicating a current screen group to which the current screen belongs; a first display controller that, in response to an operation of one select button out of the plural select buttons by a user, stores data indicating the current screen currently displayed on the display into said memory as the screen specifying data of the current screen group indicated by the current group data, stores data indicating a screen group corresponding to the operated select button in said memory as the current group data, selects a screen indicated by the screen specifying data of the screen group indicated by the current group data, and controls the display to newly display the selected screen as the current screen, such that the current screen group changes to the screen group to which the selected current screen belongs; a second display controller that, in response to a screen switching operation to the operation panel by the user, selects a screen other than the current screen among the screens belonging to the current screen group, and controls the display to newly display the selected screen as the current screen; a home assigner that, in response to a home assigning operation to the operation panel by the user, selects one select button among the plural select buttons, and stores data indicating said selected select button in said memory as the home data; and a third display controller that, in response to a home displaying operation of the home button by the user, stores data indicating the current screen currently displayed on the display into said memory as the screen specifying data of the current screen group indicated by the current group data, stores data indicating a screen group corresponding to the select button indicated by the home data in said memory as the current group data, selects a screen indicated by the screen specifying data of the screen group indicated by the current group data, and controls the display to newly display the selected screen as the current screen, such that the current screen group changes to the screen group to which the selected current screen belongs.