US Patent 11625220 Digital mixer having plurality of displays

A digital mixer is disclosed having a plurality of displays and which applies a mixing process on an audio signal. The digital mixer includes an input interface, one or more processors, an output interface, at least a first display and a second display, and an operator. The operator includes a mode switching button for switching between a first mode and a second mode. The one or more processors are configured to cause parameter setting screens of audio signals of different channels to be displayed respectively on the first display and the second display when the mode switching button is set to the first mode, and cause different parameter setting screens of an audio signal of a single channel to be displayed respectively on the first display and the second display when the mode switching button is set to the second mode.