video upload by DivKid
"With Vamp Apollo View modular took the early Korg MS-20 and MS-10 filter designs, which favoured non-linear character over stability and control, they added more character with a tube input saturation stage and tube resonance feedback path, further output clipping stage options and then designed in modern stability and control. I joke in the video the filter is so rubbery it might as well be wearing a gimp mask. Vamp is also multimode with low pass, band pass and high pass modes with routable pre/post VCA and gain option, smart normalled CV options and prevision circuitry to turn it into a full single module tube voice, killer kick drum and more.
Vamp, manual, signal flow & more at // https://www.apolloviewmodular.com/mod..."
VAMP
8HP Multi-Mode LP/BP/HP Sallen-Key Filter with Tube Saturation & Distortion
VAMP is a multi-mode analogue filter that gives you low-pass, band-pass, and high-pass responses in a compact 8HP design. At its heart lies a classic Sallen-Key topology supercharged with real vacuum tube (12AU7) saturation and multiple stages of clipping, letting you move seamlessly from smooth, hi-fi filtering to snarling, overdriven character.
One half of the tube is used to saturate the input, while the other half provide MS-20-inspired resonance limiting (tube, not diodes). With FLOW placing the VCA pre-tube or post-filter, and FANGS selecting Off / Soft / Hard output clipping, VAMP ranges from subtle warmth to ferocious harmonic destruction.
FEATURES
Three filter modes: low-pass, band-pass, and high-pass
Classic Sallen-Key topology with tube saturation and clipping
12AU7 vacuum tube: one half for input drive, one half for resonance distortion
MS-20-style resonance limiting/clipping for aggressive tones
FLOW switch: Integrated VCA pre-tube or post-filter
FANGS: output clipping: off / soft clipping / hard clipping
1V/Oct cutoff tracking: use VAMP as a VCO in self-oscillation
Extensive CV control: GAIN, FREAK (cutoff), REZ (resonance) (all with attenuverters)
Self-oscillation for screaming tones
TECH SPECS
8HP
30mm Depth
40mm Max Tube Height from panel
Reverse polarity protected
+12V 230mA
-12V 70mA
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