| 摘要 |
PURPOSE:To improve the effect of a device with a simple operation without automatically applying a reverberation effect to an MC's voice, etc. by applying the reverberation effect at all times to one microphone signal and applying only the reverberation to the other microphone signal. CONSTITUTION:The input signals from two microphones 1, 2 of a 'KARAOKE' (orchestration without lyrics) device are respectively separately amplified in the 1st and 2nd amplifier circuits 4, 5 and the outputs from both amplifier circuits 4, 5 are mixed in a mixing circuit 6. The reverberation component is applied by a reverberation circuit 7 to the output of the circuit 6 and the output applied with the reverberation is applied to a switch 8. The presence or absence of the output from one amplifier circuit 5 is detected by a signal detecting circuit 9 and is applied to one terminal of an OR circuit 12. Said output is logically operated with the control signal from a control signal terminal 3 in the circuit 12. The opening and closing of the switch 8 are controlled by the output thereof. The output is applied to the output terminal 10 without applying the reverberation effect thereto if the control signal is L and there is no output from the amplifier circuit 5. The output is applied thereto after applying the reverberation effect to the output if there is the output from the amplifier circuit 5. |
