Patent ID: 8351620

Claim:
A volume adjustment method, comprising: a storing step of storing, in a storage means, first gain control values with a control values application range, the first gain control values are used for controlling gains of a sound signal from a sound source device to each of multiple volumes according to a specified range of gain control values selected from among the first gain control values, the number of gain control values in the specified range being less than the number of first gain control values; a display step of displaying on a screen a menu of a plurality of source devices, and in response to a selection of the displayed source devices, displaying a movement specifier on a movable range indicator and a predetermined position on the movable range indicator concurrently on the screen, wherein the movement specifier being a movable bar that represents a position within the control values application range; a specifier movement adjustment step of moving the movement specifier on the movable range indicator according to a movement specification on the movable range indicator against said movement indicator; a control values application range determination step of determining the respective position within the control values application ranges of the selected source device against the first gain control values based on an amount of movement of the movement specifier moved on the movable range indicator, where the determined position within the control values application range of the selected source device includes a respective group of gain control values from the first gain control values, and the respective group of gain control values is used for adjusting gain of the respective sound signal from the selected source device; an input specifying step for specifying a source device of the sound signal from among a plurality of input devices; and a volume adjustment step of adjusting the volume of the sound based on the sound signals by controlling gains of the sound signal with the gain control value corresponding to the volume of the sound specified among a plurality of the gain control values according to the gain control values selected according to the specified source device of the sound signal.