Delay, reverb unit circuit

Delay sound unit. As shown in Figure 3-30, the BBD-type simple delay reverberation circuit composed of IC 701 (LM324), IC702 (MN3207, IC 703 (MN3102), etc.) is specially designed for four microphone inputs and is controlled by a "reverberation switch"
I controls
its connection or cut-off. When SA701 is connected to the "OFF" position, the delay reverberation circuit does not work. The microphone signal is connected to the bus of the left and right channels through
R119 and R122 respectively, and passes through R119 and R122. l, CS02, and R802 are directly sent to the input terminal A of the main amplifier
. When l is connected to the "ON" position, the four microphone input signals are connected to the input terminal of the delay reverberation device through R120 and the
processed signal Then connect the left and right sound busses through RP70z, R706, and R70 respectively. If you require the sound system to obtain a delayed reverberation effect, you can connect another one to
    the external effect terminal (EFFECT. OUT/1N) of the main amplifier.
Professional delay amplifier or effector.