| 摘要 |
A device for automatic turning of an electronic musical instrument, has a phase comparator, converter circuit and a circuit maintaining a specific signal level value. A sweep circuit and voltage controlled oscillator produce musical notes in a stipulated sequence. The output of the oscillator is connected to one input of the phase comparator and a second input is used to receive a normal signal. One output of the scan signal production circuit is connected to the input of the sweep circuit, and the non signal circuit has a gate circuit connected to a monostable multivibrator operated by a turning circuit. |
