Patent ID: 7102072

Claim:
An apparatus for correcting tone pitches of a tone waveform comprising: a pitch detecting device which detects a tone pitch of a given tone waveform; a correction target note pitch providing device which provides a correction target note pitch to which said tone pitch of said given tone waveform is to be corrected; a pitch correcting device which corrects the detected tone pitch of said given tone waveform to said correction target note pitch; a correction target note exhibiting device which includes indicator elements corresponding to respective note pitches for indicating said correction target note pitch by lighting a corresponding one of said indicator elements, said indicator element increasing its illuminance gradually to a maximum illuminance with a predetermined time constant to start lighting and decreasing its illuminance gradually to a minimum illuminance with a predetermined time constant to extinguish lighting, and which thus exhibits said correction target note pitch; and a pitch correction exhibiting device which exhibits the conditions of the pitch correction by said pitch correcting device.