Patent ID: 8686274

Claim:
A pitch shifting device comprising: an input device configured to receive a musical sound signal of an electronic stringed musical instrument; a pitch detection device that detects pitch information of the musical sound signal received by the input device; a pitch information storage device that stores a group of pitch shift information, wherein the group of pitch shift information correlates the pitch information of the musical sound signal with pitch shift information for shifting the pitch of the pitch information; a pitch shift information readout device that reads out pitch shift information corresponding to the pitch information detected by the pitch detection device from the group of pitch shift information stored in the pitch shift information storage device; a pitch shift device that pitch-shifts the musical sound signal received by the input device based on the pitch shift information read out by the pitch shift information readout device; and a bending detection device that detects bending on the electronic stringed musical instrument, wherein the pitch shift device includes an interpolation device that performs, when bending is detected by the bending detection device, a control of interpolating for a pitch shift change in the musical sound signal accompanying a change in the pitch shift information read out by the pitch shift information readout device from the group of pitch shift information.