| 摘要 |
A monophonic electronic music synthesizer in which keying signals are collected on common note busses and common octave busses and then stored in note latches and octave latches of special design to be reset by a keydown signal only in the absence of a setting keying signal. Tone signals from a top octave tone generator are gated by separate note gates arranged in a high note preference arrangement and controlled by signals stored in note latches. A chain of frequency dividers fed by the gated high select tone signal produces octavely related tone signals which are gated by separate octave gates controlled by keying signals stored in octave latches. A low octave lockout circuit locks out keying signals from all but the highest octave in which a keyswitch is actuated to complete a high select system capable of being readily integrated with a polyphonic organ system using a common control keyboard. A simple voltage-controlled filter for a synthesizer and a volts per octave circuit fed by octave and note latch outputs are described. |
