An audio device being a mobile terminal includes: first and second playback units; and a display controller that causes a display to display a screen including an operation element for accepting a user operation. The display controller includes: a first display controller to display a first screen including an operation element for the first music data; a second display controller to display a second screen including an operation element for the second music data; a third display controller to display a third screen including a third operation element including one of an operation element for both the first and second music data or an operation element for adjusting an audio output ratio, the third screen not including an operation element related to the playback setting; and a display transition controller to display the first-third screens so as to make transition between the first-third screens based on the user operation.