Doepfer A-137-2 Wave Multiplier 2 radial A switchable low-frequency roll-off reduces

A switchable low-frequency roll-off reduces pickup of undesired ambient noise

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Doepfer A-137-2 Wave Multiplier 2 radial A switchable low-frequency roll-off reducesModule 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