Doepfer A-138a Linear Mixer

Linear mixer for mixing up to 4 signals on one output. Best suited for CVs, but audio is also an option. If input 1 remains unconnected, controller 1 can be used as an offset controller.

Due to its linear characteristics, the A-138a is primarily suitable for mixing control voltages. You can mix audio signals with it, but you have to accept an unfavorable control behavior.

If the first input remains unconnected, the first potentiometer serves as an offset regulator for setting a DC voltage. A jumper can be used to determine whether an offset from -5V to 0V or from 0V to 5V is generated, or this function can be switched off.