| 摘要 |
PURPOSE:To mix optional plural sounds independently of an external input changeover switch by utilizing an FM carrier to input a signal to be mixed from an FM reception section and applying the signal to a variable resistor to a switch. CONSTITUTION:A signal from a microphone 7 using an FM wave as the carrier is received by an FM antenna, demodulated by an FM antenna reception section 3 and fed to one end (g) of a mixing variable resistor R1 via a switch S4. On the other hand, when an external low frequency signal from a record disc is inputted to external input terminals (b), (c) with mixing selection switches S7, S8 turned on, the signal is inputted to one end (h) of a resistor R1 with switches S5, S6 turned on. A signal mixed to an optional level is outputted at a mixing output terminal (i) by adjusting a slider of the resistor R1 and a mixing reproduc ing output is outputted in voice from a speaker 5. Thus, optional plural sounds are mixed. |
