Patent ID: 8878044

Claim:
A processing device for displaying a state of a tone generation apparatus, the tone generation apparatus being configured to be capable of generating tones in correspondence with individual ones of a plurality of sound generation parts and allocating desired sound colors and pitch ranges to the individual sound generation parts, said processing device comprising: a first display control section adapted to present, on a display device, a display area for displaying information related to the plurality of sound generation parts; a selection section adapted to selectively set individual ones of the sound generation parts either in a sound generating state or in a non-sound-generating state; a division control section adapted to divide the display area in order to set sub display areas corresponding to one or more of the sound generation parts having been set in the sound generating state by said selection section; and a second display control section adapted to display the information related to the sound generation parts, having been set in the sound generating state, in corresponding ones of the sub display areas set by the division control section dividing the display area.