| 摘要 |
PURPOSE:To ensure a simple and assured switching operation of a switch at a time of sound recording by using the output of a switch circuit as a sound recording signal output and at the same time using the signal selected by the 1st changeover switch and the output of the 3rd changeover switch which selects another optional signal as a monitor signal output. CONSTITUTION:The changeover switches 11 and 12 interlock with each other, and inputs A, B and C and reproduced inputs A and B are connected to switching positions (a)-(e) of the switch 11 respectively. Then a signal is selected in response to the switching position, and this selected signal is delivered as sound recording outputs A and B via impedance elements 20 and 21. Then a changeover switch 13 connects the positions (a)-(e) corresponding to inputs A-C and reproduced inputs A and B to the selection output of the switch 11 and has a corresponding switching position (f). The signal selected through these switches is delivered as a monitor output. Therefore an input signal is obtained independently of the switch 11 when the monitor signal is set at positions (a)-(e) of the switch 13 and then obtained subordinately to the switch 11 at the position (f). |
