Potentiometers are just variable resistors, and as you'd expect they have different resistance ratings. In addition they are logarithmic tapers which means the resistance is very non linear. They use rotary encoders, which control the digital volume attenuation feature that's built into the DAC chip. Administrator Joined The schematic of passive volume control includes only 5 main components: dual linear potentiometer, 2 resistors and 2 mini jack sockets.
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