Abstract: A volume adjustment device includes a display section, touch panel, and a controller which displays a slide bar including a knob, receives a movement goal position of the knob, adjusts volume of an audio signal to volume value corresponding to a position of the knob, moves the knob with a moving speed of the target of which the movement is received within a normal area in case that it receives movement of the target into a limit area in which the knob cannot move to not less than lower limit over the normal area in which the knob can move freely, and moves the knob and the lower limit of the limit area from the lower limit of the limit area to the target with the same predetermined speed as expansion speed of the limit area while it expands the normal area toward the limit area side.

Abstract: To change volume by a user quickly and prevent that loud audio that the user does not intend occurs. In case that the controller 2 receives movement of a target 23 to a limit area over a normal area, it moves a knob 22 with moving speed of the target 23 that movement of which is received within the normal area. And, the controller 2 moves the knob 22 and lower limit of the limit area from the lower limit of the limit area to a target 23 that is a movement goal position of the knob 22 with the same predetermined speed as expansion speed of the limit area while it expands the normal area toward the limit area side with the predetermined speed.

Abstract: An optical disk device which flexibly and efficiently executes verification of recorded data is provided. A drive controller sets an area to be verified and a mode of verification according to a command which is supplied from a host device. For the area to be verified, the user selects one or a plurality of lead-in, inner, middle, and outer areas. For the verification mode, the user selects one of an immediate execution mode and an in-close-command execution mode. In a duplicator or the like in which same data is recorded on a plurality of optical disks, the user can designate an important data portion and selectively execute verification.

Abstract: A disk inspection apparatus for discriminating disks. The disk inspection apparatus has an ECC control section and a comparison section. The ECC control section measures the number of error corrections PIE and the number of error correction failures PIF in a predetermined section of the disk. The comparison section discriminates the disk as a disk with a deterioration in jitter characteristic when the minimum or the average of the PIE exceeds a first threshold value; discriminates the disk as a normal disk when the maximum of the PIF is equal to or smaller than a second threshold and the minimum or the average of the PIE is equal to or smaller than the first threshold value; and discriminates the disk as a scratched disk when the minimum or the average of the PIE is equal to or smaller than the first threshold value and the maximum of the PIF exceeds the second threshold value.

Abstract: An optical disk device which flexibly and efficiently executes verification of recorded data is provided. A drive controller sets an area to be verified and a mode of verification according to a command which is supplied from a host device. For the area to be verified, the user selects one or a plurality of lead-in, inner, middle, and outer areas. For the verification mode, the user selects one of an immediate execution mode and an in-close-command execution mode. In a duplicator or the like in which same data is recorded on a plurality of optical disks, the user can designate an important data portion and selectively execute verification.