Electronic musical instrument with time division keyboard control - has note signal generator with binary information produced by timing fixed frequency

摘要

The electronic musical instrument has a keyboard which is controlled by time division. The instrument generates and transmits parallel signals which represent notes on a keyboard to respective circuits corresponding to each key. A summation of the signals is carried out via logic circuits and transmitted to detectors. The system consists of a note signal generator with binary information corresponding to the notes of the respective keys on the keyboard. They are generated in sequence and cyclically by means of timing pulses of a fixed frequency. The binary information is decoded to form different timing signals. The tone signals are produced in circuits from the signals fed to it represent the required notes. These notes are amplified via a loudspeaker.