Electric organ and method of operation

The method of operating an electronic organ having solo and accompaniment keyboards, a tone generator having terminals at respective frequencies, transducer means, and keyers operable when actuated to connect the terminals of said generator to said transducer means, scanning said solo keyboard and generating a first data stream in which signals are developed for depressed keys in respective time slots of the data stream, causing a respective chord to play upon depression of each of a group of keys of the accompaniment keyboard, storing a plurality of control signals, selecting a respective group of said signals for each key of said group of keys which is depressed, presenting said selected signals in succession and at the same rate as the keys of the solo keyboard are scanned, gating the presented signal to a respective storage station simultaneously with the development of a key down signal in said first data stream, scanning said storage stations in synchronism with the scanning of said solo keyboard to generate a second data stream in which a stored signal appears as a second key down signal in a respective time slot, summing the first and second data streams to obtain a third data stream, and actuating the keyers in conformity with the key down signals in the third data stream.

The method of operating an electronic organ having solo and accompaniment keyboards, a tone generator having terminals at respective frequencies, transducer means, and keyers actuatable to connect the terminals of said generator to said transducer means, which comprises;

• scanning the solo keyboard of the organ to generate a data stream in which a depressed key of the keyboard develops a first key down signal in a respective time slot of the data stream, causing at least one note to sound for each key of the accompaniment manual which is depressed, storing a respective group of further signals for each key of the accompaniment manual, presenting selected ones of said further signals in succession and at the same rate as the keys of the solo keyboard are scanned for each key of the accompaniment manual which is depressed, inserting a said further signal as a second key down signal on said data stream in a respective time slot and in timed relation to said first key down signal, and actuating said keyers in conformity with the first and second key down signals.

The method of operating an electronic organ having solo and accompaniment keyboards, a tone generator having terminals at respective frequencies, transducer means, and keyers actuatable to connect the terminals of said generator to said transducer means, which comprises;

• scanning the solo keyboard of the organ to generate a data stream in which depressed keys of the keyboard develop first key down signals in respective time slots of the data stream, causing at least one note to sound for each key of the accompaniment manual which is depressed, storing a respective group of further signals for each key of the accompaniment manual, presenting selected ones of said further signals in succession and at the same rate as the keys of the solo keyboard are scanned for each key of the accompaniment manual which is depressed, inserting said two further signals as second key down signals on said data stream in respective time slots and in timed relation to said first key down signals, and actuating said keyers in conformity with the first and second key down signals.

In an electronic organ having solo and accompaniment keyboards, a tone generator, transducer means, and keyers interposed between respective terminals of said tone generator and said transducer means;

• first means for scanning the keys of said solo keyboard sequentially and operable for generating a first data stream corresponding to said solo keyboard and including means responsive to the depression of a key of said solo keyboard for developing a first key down signal in a respective time slot of said first data stream, second means operable in synchronism with said first means for generating a second data stream, third means responsive to the simultaneous depression of a key of each keyboard for developing at least one second key down signal in a respective time slot of said second data stream fourth means for summing said first and second data streams to generate a third data stream having both of said first and second key down signals in respective time slots thereof, and fifth means for actuating said keyers in conformity with the key down signals of said third data stream.