Button type electronic volume control circuit

Button type electronic volume control circuit

Shown is a push-button electronic volume and tone adjustment circuit, which uses two integrated circuits, namely TC9 ]53AP for volume adjustment and
TC9155AP for tone control. The volume or tone will change continuously while the button is pressed.
    It can be seen from the figure that the two-channel audio signals (L, R) are sent to the integrated circuit from the ③ and @ pins of ICl TC 915:3AP respectively, and are output by the @ pin and @ pin after being controlled by the volume, treble
, and bass.