Combined tone generation on a single keyboard for an electronic musical instrument
First Claim
1. In a musical having a first tone generator for producing a first preselected musical tone and having a plurality of second tone generators for producing a second preselected musical tone and in which said first and second tone generators are assigned to actuated keyswitches contained in a keyboard array of keyswitches corresponding to musical notes wherein each keyswitch is operable in an unactuated or in an acutated keyswitch state, apparatus for assigning the keyboard keyswitch corresponding to the highest frequency musical note to said first tone generator and for assigning all other actuated keyboard keyswitches to corresponding ones of said plurality of second tone generators comprising;
- a note detection means for detecting the keyswitch states of keyswitches in said keyboard array of keyswitches and wherein a state change signal is generated each time that a keyswitch changes its keyswitch state and wherein a new note signal is generated corresponding to each keyswitch whose keyswitch state changes from an unactuated to an actuated keyswitch state,a high note detector which generates a high note data word identifying the keyswitch corresponding to the highest frequency of the actuated keyswitches only upon each occurrence of a said new note signal, andan assignor means responsive to said new note signal and responsive to said high note data word whereby said first tone generator is assigned only to the keyswitch identified by said high note data word and whereby all other keyswitches in an actuated state at the time of occurence of a said new note signal are assigned only to members of said plurality of second tone generators.
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Accused Products
Abstract
A keyboard operated electronic musical instrument is disclosed in which an independent monophonic tone synthesizer is operated from the same keyboard that controls the generation of tone from a polyphonic tone generation system. The highest frequency note is assigned to the monophonic tone synthesizer and all other actuated keyboard switches are assigned to the polyphonic tone generation system. The detection of the highest note is initiated each time that a keyswitch changes from an unactuated to an actuated state. An alternative arrangement is to assign the lowest frequency note to the monophonic tone synthesizer.
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Citations
10 Claims
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1. In a musical having a first tone generator for producing a first preselected musical tone and having a plurality of second tone generators for producing a second preselected musical tone and in which said first and second tone generators are assigned to actuated keyswitches contained in a keyboard array of keyswitches corresponding to musical notes wherein each keyswitch is operable in an unactuated or in an acutated keyswitch state, apparatus for assigning the keyboard keyswitch corresponding to the highest frequency musical note to said first tone generator and for assigning all other actuated keyboard keyswitches to corresponding ones of said plurality of second tone generators comprising;
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a note detection means for detecting the keyswitch states of keyswitches in said keyboard array of keyswitches and wherein a state change signal is generated each time that a keyswitch changes its keyswitch state and wherein a new note signal is generated corresponding to each keyswitch whose keyswitch state changes from an unactuated to an actuated keyswitch state, a high note detector which generates a high note data word identifying the keyswitch corresponding to the highest frequency of the actuated keyswitches only upon each occurrence of a said new note signal, and an assignor means responsive to said new note signal and responsive to said high note data word whereby said first tone generator is assigned only to the keyswitch identified by said high note data word and whereby all other keyswitches in an actuated state at the time of occurence of a said new note signal are assigned only to members of said plurality of second tone generators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a musical instrument having a first tone generator for producing a first preselected musical tone and having a plurality of second tone generators for producing a second preselected musical tone and in which said first and second tone generators are assigned to actuated keyswitches contained in a keyboard array of keyswitches corresponding to musical notes wherein each keyswitch is operable in an unactuated or in an actuated keyswitch state, apparatus for assigning the keyboard keyswitch corresponding to the lowest frequency musical note to said first tone generator and for assigning all other actuated keyboard switches to corresponding ones of said plurality of second tone generators comprising;
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a note detection means for detecting the keyswitch states of keyswitches in said keyboard array of keyswitches and wherein a state change signal is generated each time that a keyswitch changes its keyswitch state and wherein a new note signal is generated corresponding to each keyswitch whose keyswitch state changes from an unactuated to an actuated keyswitch state, a low note detector which generates a low note data word identifying the keyswitch corresponding to the lowest frequency of the actuated keyswitches only upon each occurrence of a said new note signal, and an assignor means responsive to said new note signal and responsive to said low note data word whereby said first tone generator is assigned only to the keyswitch identified by said low note data word and whereby all other keyswitches in an actuated state at the time of occurrence of a said new note signal are assigned only to members of said plurality of second tone generators.
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10. In a musical instrument having a first tone generator for producing a combination musical tone comprising a first and second preselected musical tone and having a plurality of second tone generators for producing said second preselected musical tone in which said first and second tone generators are assigned to actuated keyswitches contained in a keyboard array of keyswitches corresponding to musical notes wherein each keyswitch is operable in an unactuated or in an actuated keyswitch state, apparatus for assigning the keyboard keyswitch corresponding to the highest frequency musical note to said first tone generator and for assigning all other actuated keyboard keyswitches to corresponding ones of said plurality of second tone generators comprising:
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a note detection means for detecting the keyswitch states of keyswitches in said keyboard array of keyswitches and wherein a state change signal is generated each time that a keyswitch changes its keyswitch state, and wherein a new note signal is generated corresponding to each keyswitch whose keyswitch state changes from an unactuated to an actuated keyswitch state, a high note detector which generates a high note data word identifying the keyswitch corresponding to the highest frequency of the actuated keyswitches only upon each occurrence of a said new note signal, a first generating means for creating a first waveshape data set corresponding to said first preselected musical tone, a second generating means for creating a second waveshape data set corresponding to said second preselected musical tone, a combination means whereby said first waveshape data set and said second waveshape data set are combined to form a combined waveshape data set, a first generation means for creating a musical tone in response to said combined waveshape data set, a plurality of a second tone generation means each of which creates a musical tone in response to said second waveshape data set, and an assignor means responsive to said new note signal and responsive to said high note data word whereby said first tone generation means is assigned only to the keyswitch identified by said high note data word and whereby all other keyswitches in an actuated state at the time of occurrence of a said new note signal are assigned only to members of said plurality of second tone generation means.
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Specification