Title: Electronic musical instrument with musical composition fashion selectors

What is claimed is:

1. An electronic musical instrument comprising:

a first keyboard having a plurality of keys for performing a melody;

a second keyboard having a plurality of keys for performing an accompaniment;

a melody tone generator generating a melody tone in response to depression of a key of said melody performance keyboard;

an accompaniment tone generator generating an accompaniment tone in response to depression of a key of said accompaniment performance keyboard;

a plurality of melody musical composition fashion selection switches connected to a like plurality of first logic circuit means for designating a single one of a musical composition fashion of a melody tone to be produced from among a plurality of predetermined kinds of musical composition fashions for melody;

a plurality of accompaniment musical composition fashion selection switches connected to a like plurality of second logic circuit means for designating a single one of a musical composition fashion of an accompaniment tone to be produced from among a plurality of predetermined kinds of musical composition fashions for accompaniment;

said second logic circuit means being connected to said first logic circuit means such that the musical composition fashion of an accompaniment tone is selected in correspondence with the selected musical composition fashion of a melody tone when none of said plurality of accompaniment musical composition fashion selection switches are operated, and such that the musical composition fashion of a melody tone is selected in correspondence with the selected musical composition fashion of an accompaniment tone when none of said plurality of melody musical composition fashion selection switches are operated;

a modifying parameter generator which generates a modifying parameter corresponding to an operated one of said musical composition fashion selection switches;

modifying means for modifying outputs of said melody and accompaniment tone generators in accordance with said modifying parameter generated from said modifying parameter generator; and

means for producing a musical tone signal in accordance with said output of said modifying means.

2. An electronic musical instrument according to claim 1 wherein said second keyboard comprises a chord keyboard suitable for performing a chord as said accompaniment.

3. An electronic musical instrument according to claim 1 wherein said second keyboard comprises a bass keyboard suitable for performing a bass as said accompaniment.

4. An electronic musical instrument according to claim 1 wherein said modifying parameter generator generates a parameter that varies an oscillation frequency of outputs of said melody tone generator and said accompaniment tone generator.

5. An electronic musical instrument according to claim 1 wherein said modifying means further includes:

a control circuit, which when either one of said melody musical composition fashion selection switch and said accompaniment musical composition fashion selection switch is operated, causes the other selection switch to generate a selection signal;

said control circuit generating a selection signal for a switch operated prior to said operation when the other selection switch is operated.

6. An electronic musical instrument according to claim 1 wherein said modifying parameter generating means further comprises:

control data memory means for storing a third musical composition designating signal and for generating said third designating signal in accordance with said melody and accompaniment designating signals;

and means for combining said first, second and third musical composition designating signals into said modifying parameter which is applied to said melody tone generator and said accompaniment tone generator.

7. An electronic musical instrument according to claim 1 wherein said modifying parameter generator includes a third logic circuit means comprising means for generating, when one of said melody musical composition fashion selection switches is operated, melody and accompaniment selection signals corresponding to the operated melody musical composition fashion selection switch, and means for generating, when an accompaniment musical composition fashion selection switch is operated, an accompaniment selection signal, as a substitution of the accompaniment portion of said melody and accompaniment selection signals, corresponding to the operated accompaniment musical composition selection switch and

means for generating said modifying parameters by using said selection signals.

8. An electronic musical instrument according to claim 1 wherein said modifying parameter generator includes:

a third logic circuit means comprising means for generating, when one of said accompaniment musical composition fashion selection switches is operated, melody and accompaniment selection signals corresponding to the operated accompaniment composition fashion selection switch, and means for generating, when a melody musical composition fashion selection switch is operated, a melody selection signal, as a substitution of the melody portion of said melody and accompaniment selection signals, corresponding to an operated melody musical composition fashion selection switch; and

means for generating said modifying parameter by using said selection signals.

9. An electronic musical instrument according to claim 7 or claim 8 wherein said third logic circuit means comprises

a first logic circuit for generating said melody musical composition fashion designating signal;

and a second logic circuit for generating said accompaniment musical composition fashion designating signal.

10. An electronic accompaniment and melody musical instrument according to claim 7 or claim 8 wherein said musical composition fashion selection switches and said third logic circuit means are constituted by a plurality of single pole double throw selection switches, and means for connecting a stationary contact of a preceding selection switch to a movable contact of a succeeding selection switch.

11. An electronic musical instrument according to claim 9 wherein said third logic circuit means comprises:

first and second logic circuits respectively including OR gate circuits and flip-flop circuits operated by said selection switches;

third and fourth logic circuits respectively including AND gate circuits and OR gate circuits, one input of said OR gate circuits being respectively connected to outputs of said AND gate circuits and the other inputs being supplied with outputs of said flip-flop circuits of said first and second logic circuits, an AND gate circuit (AG₂₀) with inputs connected to receive outputs of said flip-flop circuits of said first and second logic circuits respectively via NOR gate circuits;

a pair of AND gate circuits with one input connected to receive outputs of said NOR gate circuits respectively and the other inputs connected to receive an output of said AND gate circuit (AG₂₀) via inverters respectively; and

means for applying outputs of said pair of AND gate circuits to the other inputs of the AND gate circuits of said third and fourth logic circuits thus causing them to produce first and second tone designating signals.

12. On electronic musical instrument according to claim 1 wherein each said melody composition fashion selection switches are of the self-returning type.

13. An electronic musical instrument according to claim 1 wherein said modifying means comprises:

a plurality of filters connected to receive the outputs of respective tone generators for imparting different tone color to said outputs;

a plurality of mixers for selectively admixing outputs of said filters; and

a selector for selecting outputs of said mixers in accordance with a selected musical composition fashion.

14. An electronic musical instrument according to claim 1 wherein said modifying means further comprises a tremolo effect circuit.

15. An electronic musical instrument according to claim 1 wherein the output of said modifying parameter generator comprises a melody musical composition fashion designating signal, an accompaniment musical component designating signal and a signal that designates characteristics of a tremolo, a tone volume, a sustain, and a vibrato.

16. An electronic musical instrument according to claim 1 which further comprises display means for displaying a selected musical composition fashion.

17. An electronic musical instrument according to claim 1 wherein said second keyboard for performing an accompaniment comprises keyboards for respectively performing a chord and a bass.

18. An electronic musical instrument according to claim 1 wherein said modifying means comprises an expression device which controls tone volume of the produced musical tone according to a degree of depression of a pedal.


Other info:


Inventors: Niinomi, Naoyuki (Hamamatsu, JP)
Watanabe, Kunihiko (Hamamatsu, JP)

Application Number: 06/182575
Filing Date: 1980-08-29
Publication_date: 1983-07-05
Assignee: NIPPON MUSICAL INSTRUMENTS MFG (JP)

Primary Class(es): 84/712 84/665, 84/666, 84/663, 984/340, 84/DIG.022, 84/662
Other Classes: G10H1/24; G10H1/38; G10H1/12; G10H1/46
US Patent Ref:

3626078	December, 1971	Sekiguchi	84/12.4
3697664	October, 1972	Hiyama	84/11.7
3803338	April, 1974	Adachi	84/11.7
3886834	June, 1975	Okamoto	84/11.7
3897709	August, 1975	Hiyoshi et al.	84/11.9
4129055	December, 1978	Whittington et al.	84/10.1
4191082	March, 1980	Koike	84/11.9

Other Refs:
Primary Examiner: Witkowski S. J.
Assistant Examiner:
Attorney: Blakely, Sokoloff, Taylor & Zafman