Recorder graphic equalizer drive circuit

Recorder graphic equalizer drive circuit

What is shown is the graphic equalizer drive circuit in the recorder . During recording and playback, the intensity and frequency of the sound can
be displayed on the liquid display in the form of dynamic graphics. For the recording pair, the signals
from the record player (PHOND), radio head (TUNER) and external audio (AUX) are selected by the input signal selection switch and processed by the LC7520 two-channel 7-segment graphic equalizer, and then the signals enter the LA6458 for processing. Output after buffering and amplification. At the same time, the two signals are mixed and amplified and passed through 7 band-pass filters to extract the signal components of each frequency band and then sent to the liquid crystal display driving circuit LC7560. LC7560 directly drives the crystal display screen. The entire circuit is controlled by the CPU , and the working status of each circuit is controlled by the CPU through the data line.