| 摘要 |
<p>Once a user performs touch operation on any one of knob images displayed on a display device (17), a CPU (10) identifies the touch operation as first-type touch operation and starts a state where selection of a parameter represented by the touched or selected knob image is kept effective (S2 - S4). Once termination of the first-type touch operation is detected, the CPU terminates the selection of the parameter (S5, S6). Further, once new touch operation is detected while the parameter is selected via the first-type touch operation, the CPU identifies the new touch operation as second-type touch operation and changes the value of the currently selected parameter on the basis of a distance and direction of movement of the second-type touch operation (rotating operation) (S8). At that time, touch operation on any other parameter image than the currently selected parameter image is made invalid.</p> |
