The Doepfer A-136 is a distortion and waveshaping module for the Eurorack A-100 series system. The incoming audio is comprised into three sections with manual controls over the parameters and these are: the positive component of the signal with an adjustable clipping level and positive or negative amplification, the negative component of the signal with the same controls, and finally the original signal with positive or negative amplification which can be blended with the distorted signal for added clarity.