Method and apparatus for reproducing a musical presentation

Details Method and apparatus for reproducing a musical presentation Method and apparatus for reproducing a musical presentation

1976-04-28

1979-01-02

Witkowski, Stanley J.

Music

Instruments

Automatic

84462, 84DIG29, G10F 100, G10G 304

Patent

active

041321421

ABSTRACT:
There is disclosed a method and apparatus for reproducing a musical presentation wherein musical data, from such presentation, such as keyboard actuations of a keyboard-type musical instrument, is encoded and stored in a code which has information contained in the transitions only and the sense and direction of such transitions are ignored. This avoids several major drawbacks of bi-phase level code previously disclosed in the prior art because the (1) phase of the signal need not be maintained and, (2) the bi-phase level code cannot be recovered following a dropout until a 1-0 or a 0-1 transition occurs.
There is also disclosed a data dropout detection system for assuring that the wrong music is not played.

REFERENCES:
patent: 3539701 (1970-11-01), Milde
patent: 3647929 (1972-03-01), Milde, Jr.
Service Manual for Teledyne Piano Recorder/Player, Model PP-1, Assembly No. ATL-3288, Oct. 20, 1975.
Assembly Instruction for Teledyne Piano Recorder/Player, Model PP-1, Assembly No. ATL-3288, Jul. 10, 1975.

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