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US 4,052,924 AGranted
Interval repeat generator for keyboard musical instrument
AssigneeKawai Musical Instrument Mfg. Co., Ltd.
InventorsRalph Deutsch, Leslie J. Deutsch
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AssigneeKawai Musical Instrument Mfg. Co., Ltd.
InventorsRalph Deutsch, Leslie J. Deutsch
Estimating the term…
A keyboard instrument having key-operated switches connected in groups corresponding to musical octaves. The groups of keys are pulsed sequentially to provide successive patterns of pulses on parallel time-shared output lines, each group of keys having its own time slot by which the octave of the notes is identified. The pattern of pulses during each time slot identifies the notes within the octave that are to be generated. A repeat signal generator periodically modifies or interrupts the pattern of pulses during the associated time slot. The pattern of pulses may be in effect interrupted as to the keyed note by shifting the pattern of pulses to an adjacent time slot corresponding to another octave for repetitively generating the same note alternately in two octaves.
In a polyphonic tone synthesizer in which individual notes are generated in response to pressing selected keys, the keys being arranged in groups corresponding to octaves and the groups being arranged in divisions corresponding to separate keyboards, the groups of keys in the several divisions being repetitively pulsed in time sequence and the status of all the keys in a group being read out in the form of a parallel pattern of output pulses coincident with the sequential pulsing of each of said groups, apparatus for generating notes in a repetitive pattern in response to operation of a single key in a selected keyboard, comprising:
In a keyboard musical instrument in which key-operated switches are arranged in groups, each key-operated switch in a group corresponding to one note of the notes in an octave, each group of switches being pulsed repetitively in time sequence with the other groups, and the switches of each group selectively connecting the input pulses to a plurality of output lines to form a parallel pattern of output pulses corresponding to the pattern of selected keys in the associated octave during an associated time slot, apparatus for generating a repetitive pattern of musical notes in response to operation of single key, comprising:
Dependencies are inferred from the claim text.