| 摘要 |
PROBLEM TO BE SOLVED: To suppress reduction of a sound quality when changing a ptich of a specified sound among sound signals.SOLUTION: An acoustic processing device includes: a reference sound acquisition part 52 for acquiring a reference signal R1 showing a reference sound Q1 having a tone color different from an object sound and the same pitch as the object sound and a reference signal R2 showing a reference sound Q2 having a target pitch different from the pitch of the object sound and the same tone color with the reference sound Q1; an analysis processing part 62 for generating a conversion filter H for making the reference sound Q1 approaching to the tone color of the object sound using an object signal YB showing the object sound and the reference signal R1; and a sound processing part 64 for generating a conversion signal YC showing the sound of the target pitch by the tone color approximated to the object sound by applying the conversion filter H to the reference signal R2.SELECTED DRAWING: Figure 5 |
