Musical tone synthesizing device

• US 5,182,415 A
• Filed: 10/23/1991
• Issued: 01/26/1993
• Est. Priority Date: 10/24/1990
• Status: Expired due to Fees

• Current Assignee: Yamaha Corporation
• Original Assignee: Yamaha Corporation
• Inventors: Kunimoto, Toshifumi
• Primary Examiner(s): Witkowski, Stanley J.
• Application Number:
  US07/781,811
• Time in Patent Office: 461 Days
• Field of Search: 84/622-625, 84/630, 84/659-665, 84/692-700, 84/707, 84/735-741, 84/DIG. 9, 84/DIG. 10, 84/DIG. 26
• US Class Current: 84/660
• CPC Class Codes: G10H 1/04 by additional modulation
• CPC Class Codes: G10H 2250/465 Reed instrument sound synthesis, controlling specific features of said sound
• CPC Class Codes: G10H 2250/535 Waveguide or transmission line-based models
• CPC Class Codes: G10H 5/007 Real-time simulation of G10B, G10C, G10D-type instruments using recursive or non-linear techniques, e.g. waveguide networks, recursive algorithms
• CPC Class Codes: Y10S 84/09 Filtering
• CPC Class Codes: Y10S 84/10 Feedback

Abstract

A musical tone synthesizing device employing an operator, for generating musical tone signals by a modulation operation process. The device also employs a waveguide combined to the operator, for generating a reciprocating signal including a delay circuit for delaying the signal inputted into the waveguide feedback path, and for feeding back the output signal of the delay means to the signal, reciprocating within the waveguide.

Claims

1. A musical tone synthesizing device comprising:

modulation operation means for generating a modulated musical tone waveform signal in accordance with an inputted modulation signal; and

a waveguide, coupled with said modulation operation means, for generating a signal reciprocating therein, comprising;

delay means for delaying a signal inputted into said waveguide; and

a feed back path for feeding back an output signal of said delay means to an input of said delay means to thereby form a closed loop.

2. A musical tone synthesizing device in accordance with claim 1 wherein said waveguide is inserted in series into a feedback channel of said modulation operation means.

3. A musical tone synthesizing device according to claim 1, wherein said operation means performs a frequency modulation operation and generates signals, the frequencies of which are modulated in accordance with said modulation signal, as said modulated musical tone waveform signal.

4. A musical tone synthesizing device comprising:

a plurality of modulation operation means for generating plural musical tone signals by a modulation operation process; and

a waveguide connected between two of said operation means for generating a reciprocating signal, said waveguide comprising;

delay means for delaying a signal inputted into said waveguide; and

a feed back path for feeding back an output signal of said delay means to an input of said delay means to thereby form a closed loop.

5. A musical tone synthesizing device according to claim 4 wherein said operation means perform frequency modulation operations and generate signals, the frequencies of which are modulated in accordance with said modulation signal, as said modulation musical tone waveform signals.

6. A musical tone synthesizing device comprising:

modulation operation means for generating a musical tone signal by a modulation operation process; and

a plurality of waveguides provided in parallel and connected to said modulation operation means, for generating a reciprocating signal, each of said plurality of waveguides comprising;

delay means for delaying a signal inputted into said waveguide; and

a feed back path for feeding back an output signal of said delay means to an input of said delay means to thereby form a closed loop.

7. A musical tone synthesizing device in accordance with claim 6, wherein said waveguide further comprises:

two groups of circuits, each having an adder, a delay circuit and a filter circuit connected in series;

a first inverter which reverses the output of a first of said circuit groups and then outputs it to said adder in a second of said circuit groups;

a second inverter which reverses the output of the second circuit group and then outputs it to said adder in said first circuit group.

8. A musical tone synthesizing device in accordance with claim 6 wherein said waveguide further comprises control means for controlling the feedback amount.

9. A musical tone synthesizing device in accordance with claim 8 wherein said control means controls the feedback amount based on an external control signal.

10. A musical tone synthesizing device according to claim 6, wherein said operation means perform a frequency modulation operation and generates a signal, the frequencies of which are modulated in accordance with said modulation signal, as said modulated musical tone waveform signals.