Doepfer - A-106-5SE: 12dB SEM Type VCF Special Edition

module a-106-5 is a 12db multimode filter that is based on the filter circuit of the oberheim sem module. the filter is equipped with a band pass output and a combined low/notch/high pass output. for this output a control knob defines the relation between low and high pass signal. if both signals appear at the same level (i.e. middle position of the mix knob) one obtains a notch filter. otherwise the low or high pass signal predominates. the module does not feature self oscillation in contrast to most of the other filters of the a-100 system. the module generates a distorted audio signal if the level control is set to about 50% (i.e. center position) or more with a-100 standard signals like vcos.

inputs: audio in, cv1 in without attenuator, cv2 in with polarizer
outputs: bandpass out, low/highpass mix-out
controls: audio attenuator, cv2 polarizer, frequency, resonance, lp/hp mix

this module has a maximum current draw of 30ma. it requires 8 hp/te worth of space to fit in a eurorack frame.