QUANTITY ADJUSTMENT APPARATUS, MUSIC PLAYBACK APPARATUS, AND QUANTITY ADJUSTMENT PROGRAM

摘要

PROBLEM TO BE SOLVED: To make it possible to display a plurality of screens with few steps.;SOLUTION: A smartphone 1 includes a display unit 4 and SoC2. The SoC2, as a scale, draws a line segment having the same length and the same center point with a first color in an arc shape. Further, the SoC2 draws a volume bar indicating current sound volume on the scale with a second color different from the first color. In addition, the SoC2 displays the scale and a part of the volume bar on the display unit 4. The smartphone 1 further includes a touch panel 51. When the touch panel 51 receives a touch operation and a slide operation on the touch panel 51, the SoC2 changes rate of change of sound volume according to distance from a touch position to a predetermined center point.;SELECTED DRAWING: Figure 4;COPYRIGHT: (C)2019,JPO&INPIT