Patent ID: 8050427

Claim:
A digital mixer including a plurality m of signal processing channels, each of the signal processing channels processing an audio signal in accordance with parameters set for the signal processing channel, the parameters set for each of the channels including first-type parameters and second-type parameters, said digital mixer comprising: a display device capable of displaying graphics; a plurality k of controls operable by a user, where k<m; a first display control section that, in response to a first selection operation by the user, selects k channels from among the m signal processing channels, and causes said display device to display a channel strip screen displaying a plurality of parameters for each of selected k channels, wherein k second-type parameters, of a function common to the selected k channels, among the parameters displayed on the channel strip screen, are in a selected state, and parameters other than the k second-type parameters are in a non-selected state; a second display control section that, in response to a second selection operation to select a desired one of the parameters displayed on the channel strip screen by the user, opens a parameter window related to the selected parameter over the channel strip screen, said parameter window displaying, for each of selected k channels, parameters related to the selected parameter, wherein, (1) when the second selection operation selects a first-type parameter, the second display control section opens the parameter window related to the selected first-type parameter, (2) when the second selection operation selects a second-type parameter in the non-selected state, the second display control section sets k second-type parameters at the same position as the selected second-type parameter into the selected state without opening the parameter window, and (3) when the second selection operation selects a second-type parameter in the selected state, the second display control section opens the parameter window related to the selected second-type parameter; an assignment section that, (1) when no parameter window is opened over the channel strip screen, assigns each of the k second-type parameters in the selected state, displayed on the channel strip screen, to each of the k controls, and (2) when a parameter window is opened over the channel strip screen, assigns each of k parameters, displayed on the parameter window, to each of the k controls; and a parameter control section that, in response to a setting operation on any of the k controls by the user, sets a value of the parameter currently assigned to the operated control.