Module A-137-2 is another version of a wave multiplier. In contrast to the A-137-1 Wavemultiplier I the A-137-2 generates four phase-shifted copies of a VCO signal applied to the audio input. 

The four shifted signals are added to the original signal to obtain a fat sound similar to five independent VCOs. 

The phase shifting is made by a simple circuit that works only for sloped signals like sawtooth, triangle or sine, but not for rectangles or pulses

technical details

Width: 14HP 

Connections: 
CV1 input 
CV2 input 
CV3 input 
CV4 input 
Audio input 
Audio output