This filter is a voltage-controlled low pass filter with a selection between 4 poles (24db/octave) or 2 poles (12db/octave). The travel of the FREQ pot has been calibrated to give you the best experience in the original 4 poles mode. The FM CV input can be used to modulate the cutoff frequency of the filter. This CV signal is added to the manual position of the FREQ pot. Note that the FM input has an attenuverter. The VOCT input can be used to close the filter more or less based on the pitch of the note played by your musical CV source. It can also be used to “play” the filter when it is self-resonating. The filter will be in tune across about 8 octaves. Self-resonance is occurring when the RES pot is around 4 o’clock or higher. The resonance can be also voltage-controlled using the Q CV input, this signal is added to the manual position of the RES slider. Q CV has also an attenuator.
Power: +12V 36mA, -12V 25mA