Sound effect applying apparatus and sound effect applying program

• US 20050288921A1
• Filed: 06/22/2005
• Published: 12/29/2005
• Est. Priority Date: 06/24/2004
• Status: Active Grant

• Current Assignee: Yamaha Corporation
• Original Assignee: Yamaha Corporation
• Inventors: Yoshioka, Yasuo, Loscos, Alex
• Granted Patent: US 8,433,073 B2
• Time in Patent Office: Days
• US Class Current: 704/205
• CPC Class Codes: G10H 1/0091 Means for obtaining special acoustic effects combined with modulation G10H1/043
• CPC Class Codes: G10H 1/10 for obtaining chorus, celeste or ensemble effects continuous modulation G10H1/043
• CPC Class Codes: G10H 2210/155 Musical effects
• CPC Class Codes: G10H 2250/235 Fourier transform; Discrete Fourier Transform [DFT]; Fast Fourier Transform [FFT]
• CPC Class Codes: G10L 21/003 Changing voice quality, e.g. pitch or formants

Abstract

In a sound effect applying apparatus, an input part frequency-analyzes an input signal of sound or voice for detecting a plurality of local peaks of harmonics contained in the input signal. A subharmonics provision part adds a spectrum component of subharmonics between the detected local peaks so as to provide the input signal with a sound effect. An output part converts the input signal of a frequency domain containing the added spectrum component into an output signal of a time domain for generating the sound or voice provided with the sound effect.

Claims

1. A sound effect applying apparatus comprising:

an input part that frequency-analyzes an input signal of sound or voice for detecting a plurality of local peaks of harmonics contained in the input signal;

a subharmonics provision part that adds a spectrum component of subharmonics between the detected local peaks so as to provide the input signal with a sound effect; and

an output part that converts the input signal of a frequency domain containing the added spectrum component into an output signal of a time domain for generating the sound or voice provided with the sound effect.

2. The sound effect applying apparatus according to claim 1, wherein the subharmonics provision part adds between the local peaks a variable spectrum component having a gain which varies irregularly.

3. The sound effect applying apparatus according to claim 2, wherein the subharmonics provision part adds the variable spectrum component in the form of a mixture of a plurality of spectrum components which have the same frequency but which have phase differences irregularly varying with one another.

4. The sound effect applying apparatus according to claim 2, wherein the subharmonics provision part further changes the gain of the variable spectrum component in accordance with a gain of the input signal.

5. The sound effect applying apparatus according to claim 4, wherein the subharmonics provision part increases the gain of the variable spectrum component as the gain of the input signal increases, and holds the gain of the variable spectrum component twhen the gain of the input signal exceeds a given level.

6. The sound effect applying apparatus according to claim 2, wherein the subharmonics provision part adjusts parameters of the variable spectrum component to be added in accordance with a pitch of the input signal, the parameters specifying at least one of a type, a frequency and a gain of the variable spectrum component.

7. The sound effect applying apparatus according to claim 1, wherein the subharmonics provision part adds a plurality of spectrum components having different frequencies between one local peak and another local peak next to said one local peak.

8. The sound effect applying apparatus according to claim 7, wherein the subharmonics provision part changes the gain of the spectrum components in accordance with a gain of the input signal.

9. The sound effect applying apparatus according to claim 8, wherein the subharmonics provision part increases the gain of the spectrum components as the gain of the input signal increases, and holds the gain of the spectrum components when the gain of the input signal exceeds a given level.

10. The sound effect applying apparatus according to claim 7, wherein the subharmonics provision part adjusts parameters of the spectrum components to be added in accordance with a pitch of the input signal, the parameters specifying at least one of types, frequencies, gains, and numbers of the spectrum components.

11. A sound effect applying program which is executable by a computer to perform a method comprising the steps of:

frequency-analyzing an input signal of sound or voice for detecting a plurality of local peaks of harmonics contained in the input signal;

adding a spectrum component of subharmonics between the detected local peaks so as to provide the input signal with a sound effect; and

converting the input signal of a frequency domain containing the added spectrum component into an output signal of a time domain for generating the sound or voice provided with the sound effect.