Method and apparatus for encoding of expression while recording

Details Method and apparatus for encoding of expression while recording Method and apparatus for encoding of expression while recording

1977-08-26

1979-10-30

Rubinson, Gene Z.

Music

Instruments

84 127, 84DIG29, 360 32, 346 33M, G10H 300, G11B 509

Patent

active

041724038

ABSTRACT:
There is disclosed a method and apparatus for encoding of expression while recording from the keyboard of an electronic player piano wherein the intensity of the music being recorded is reflected in variations in the power of the acoustic waveform produced thereby. There is a delay between the time the key is struck and the time that the note is sounded or heard by the listener. The apparatus measures the changes in power by performing a digital integration of a waveform. The key note or key switch actuations are multiplexed and a serial bit stream of data and stored in a shift register and then combined with the expression data bits to form the data stream which is encoded in a bi-phase encoder to be recorded on tape.

REFERENCES:
patent: 3604299 (1971-09-01), Englund
patent: 3771406 (1973-11-01), Wheelwright
patent: 3868882 (1975-03-01), Fukui
patent: 3905267 (1975-09-01), Vincent
patent: 3914701 (1975-10-01), Burdick

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