A-106-6 XP VCF

Doepfer's multimode filter based on the filter circuit of the Oberheim Xpander: 15 filter types from a 24 dB ladder whose four stages are mixed with different levels and polarities, eight of them at once on separate outputs, the Filter Group switch choosing between two groups. Standard version.

Key features

• 15 filter types: low pass 6 to 24 dB, high pass 6 to 18 dB, band pass, notch, all pass and their combinations with a 6 dB low pass
• Eight outputs at once, the Filter Group switch choosing between the two groups of eight
• Frequency set by hand (Frq.) and by FCV1 (about 1 V/octave) and FCV2 with its attenuator (FCV)
• Voltage controlled resonance: Q by hand and QCV with its attenuator; self-oscillation in filter group 2
• Audio input with its level control (Lev.)