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公开(公告)号：US3610800A
公开(公告)日：1971-10-05
申请号：US3610800D
申请日：1969-10-30
Applicant: NORTH AMERICAN ROCKWELL
Inventor： DEUTSCH RALPH
CPC classification number: G10H7/04 , G06F1/02 , G06F1/0328 , G10H1/0575 , G10H1/182 , G10H1/20
Abstract: In an electronic organ, the actuation of keys in accordance with corresponding, audible tones to be reproduced effects the gating of pulses into time slots of a time decision multiplexed signal, the time slots of the multiplexed signal being structured in accordance with a desired assignment sequence to correspond to the keys and to be representative thereof for identifying each note capable of being generated by the organ. A set of note, or tone, generators with availability assignment control means for capturing a pulse in the multiplexed signal are each rendered responsive to a given captured pulse for generating the tone represented by that pulse. Automatic transposition of notes, by a specified number of half steps higher or lower than the note played, is selectively effected by a time shift of pulses in the multiplexed signal by one time slot per half note to be transposed. In this manner, when an organist plays a musical selection in an original musical key, the organ produces the audible musical output in the selected, transposed musical key.
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Patent Agency Ranking
公开(公告)号：US3610806A
公开(公告)日：1971-10-05
申请号：US3610806D
申请日：1969-10-30
Applicant: NORTH AMERICAN ROCKWELL
Inventor： DEUTSCH RALPH
CPC classification number: G10H7/04 , G06F1/02 , G06F1/0328 , G10H1/0575 , G10H1/182 , G10H1/20
Abstract: In an electronic organ the actuation of keys in accordance with corresponding audible tones to be reproduced effects the gating of pulses into time slots of a time division multiplexed signal, the time slots of the multiplexed signal being structured in accordance with a desired assignment sequence to correspond to the keys and to be representative thereof for identifying each note capable of being generated by the organ. A set of note, or tone, generators with availability assignment control means for capturing a pulse in the multiplexed signal are each rendered responsive to a given captured pulse for generating the tone represented by that pulse. The appropriate tone is generated digitally in the form of amplitude samples of a waveform stored in a memory, and the amplitude samples are subsequently subjected to digital-to-analog conversion for ultimate production of the audible output of the organ. Attack and decay of the tone waveform envelope are simulated by appropriately scaling the amplitude samples at the leading and trailing portions of the waveform envelope. An adaptive sustain operating mode is provided by which the length of decay is varied according to the availability of tone generators where the number of tone generators is limited.
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3.发明授权
公开(公告)号：US3697661A
公开(公告)日：1972-10-10
申请号：US3697661D
申请日：1971-10-04
Applicant: NORTH AMERICAN ROCKWELL
Inventor： DEUTSCH RALPH
Abstract: The present invention is a multiplexed pitch generator system for use in a keyboard musical instrument to activate the voice controls of the instrument in accordance with key depressions. In the preferred embodiment of the invention there is provided a means for stepping pulses into a plurality of time slots in a cyclic manner. A plurality of keys are provided with each time slot corresponding to one particular key, and each key corresponding to a particular note. Pitch means are provided for receiving the time division multiplex signal with the gated pulses and for shifting the time slot position of selected pulses to a desired time slot location so as to simulate another note. Comparing means are used to compare the time slot position of the pulses from the pitch means with the time division multiplex signal to determine the final time slot position of a pulse. Latching means corresponding in number to the number of time slot positions are connected to the comparing means with each individual latching means being activated by a pulse occurring only in its associated time slot. The latching means, in turn, activates the voice controls of the keyboard musical instrument to sound the note or pitch associated with the pulses'' final time slot location. In a second embodiment of the invention which is used on a multiple keyboard instrument, each keyboard has one multiplexed pitch generator system associated therewith and, in addition, the output signal from the pitch generating means of one or more keyboards are connectable to the outputs from the other multiplexed pitch generators such that the musician can play a key on one keyboard and have it sound as if played from another keyboard.
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公开(公告)号：US3610805A
公开(公告)日：1971-10-05
申请号：US3610805D
申请日：1969-10-30
Applicant: NORTH AMERICAN ROCKWELL
Inventor： WATSON GEORGE A , DEUTSCH RALPH
CPC classification number: G10H7/04 , G06F1/02 , G06F1/0328 , G10H1/0575 , G10H1/182 , G10H1/20
Abstract: In an electronic organ, the actuation of keys in accordance with corresponding audible tones to be reproduced effects the gating of pulses into time slots of a time division multiplexed signal, the time slots of the multiplexed signal being structured in accordance with a desired assignment sequence to correspond to the keys and to be representative thereof for identifying each note capable of being generated by the organ. A set of note, or tone, generators with availability assignment control means for capturing a pulse in the multiplexed signal are each rendered responsive to a given captured pulse for generating the tone represented by that pulse. The appropriate tone is generated digitally in the form of amplitude samples of a waveform stored in a memory, and the amplitude samples are subsequently subjected to digital-to-analog conversion for ultimate production of the audible output of the organ. Attack and decay of the tone, or note, waveform envelope are simulated by appropriately scaling the amplitude samples at the leading and trailing portions of the waveform envelope.
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公开(公告)号：US3659488A
公开(公告)日：1972-05-02
申请号：US3659488D
申请日：1970-10-09
Applicant: NORTH AMERICAN ROCKWELL
Inventor： DEUTSCH RALPH
CPC classification number: G10H1/24
Abstract: A capture combination system for use in an electronic organ provides rapid reprogramming of the entire combination memory while permitting manual selection of desired stop combinations at any time. Desired stop combinations are selected for each piston and set into the working memory of the system. These combinations, upon command, are transferred from the working memory to a storage or external memory. A full combination of stop settings may be stored on the external memory by transfer from the internal memory, and a number of such external memories corresponding to a number of different full combinations of stop settings thus may be prepared and, subsequently, selectively presented to the system as desired. The combination settings from the external memory are transferred upon command into the internal working memory for establishing the desired combination of stop settings therein. Transfer into or out of the external memory requires but a few seconds. Whenever desired, the working memory may be altered to modify one or more stop combinations, whether set manually, or entered therein from the external memory and, in the latter case, while retaining the combinations recorded in the external memory.
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公开(公告)号：US3515792A
公开(公告)日：1970-06-02
申请号：US3515792D
申请日：1967-08-16
Applicant: NORTH AMERICAN ROCKWELL
Inventor： DEUTSCH RALPH
CPC classification number: G10H7/12
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