C4RBN

WMD's state-variable filter in 4 HP: two 2-pole filters in series, an input saturation circuit and the output wavefolder of WMD's SYNCHRODYNE, with a ping input that rings it like a vactrol.

Key features

• First 2-pole filter with simultaneous LP, BP and HP outputs; a second, series 2-pole filter on the 4P output with a selectable response
• FREQ from 2.5 Hz to 10 kHz, temperature-compensated V/OCT input, FM input with an inverting attenuator
• Resonance with manual and CV control, self-oscillating above 3 o'clock
• Input saturation set by the button and a continuous SAT CV input; output wavefolder on the 4P output (FOLD)
• PING input: a fast-decay envelope emulating a vactrol's response