Surges

A voltage-controlled filter in 8 HP with high-pass, band-pass and low-pass outputs, all usable at once, its band and low pass at 12 or 24 dB per octave (SLOPE). Two audio inputs are mixed, the first with its own gain that overdrives it when pushed; FREQ and RESO set the cutoff and the resonance, up to self-oscillation, each with a CV input, the frequency's through an attenuverter, and a V/OCT input tracks the cutoff. LEVEL sets the low pass output's level from a voltage, +7 V applied when nothing is patched.

Key features

• High-pass, band-pass and low-pass outputs at once
• SLOPE: 12 or 24 dB per octave for band and low pass
• Two inputs, the first with a gain driving it into overdrive
• FREQ and RESO CV inputs, -8 V to +8 V, FREQ through an attenuverter
• V/OCT, -3 V to +7 V, its calibration trimmer under a cover
• LEVEL: the low pass output's level, voltage controlled
• 8 HP, 35 mA on +12 V, 35 mA on -12 V