apollo-view-vamp

Apollo View Modular Vamp

8HP multimode tube filter with bite

8 HP Eurorack module

Vamp is an 8HP voltage-controlled analogue multimode filter with low-pass, band-pass, and high-pass responses, a 12AU7 vacuum tube, a relocatable VCA, resonant self-oscillation, and selectable output clipping.

Features

  • Three-mode analogue filter with low-pass, band-pass, and high-pass responses.
  • Sallen-Key filter topology with vacuum-tube saturation and clipping.
  • Flow relocates the integrated VCA before the tube or after the filter.
  • Fangs provides bypass, soft-clipping, and hard-clipping output treatments.
  • Calibratable 1V/octave tracking supports tuned self-oscillation.
  • Gain, Freak, and Rez CV inputs are normalled in series and have individual bipolar attenuverters.
  • Remember: Extreme resonance can produce very hot output levels; use soft or hard Fangs clipping to manage the signal and shape its peaks.

Controls & Jacks (19)

  • Cutoff LED Ring— Illuminated ring around the tube that indicates the combined cutoff control produced by the Freak knob, Freak CV, and 1V/Oct input.
  • Freak— Sets the filter cutoff or centre frequency from approximately 10 Hz to 21 kHz; its setting sums with Freak CV and the 1V/Oct input.
  • Freak CV— Modulates the filter cutoff frequency through the Freak CV attenuverter; breaks the normalled connection from Gain CV while remaining normal
  • Gain CV— Controls VCA level and, depending on the Flow setting, either input-tube drive or post-filter output level; normalled onward to Freak CV and
  • Audio In— Main audio input; its level determines how strongly the pre-filter triode saturates, directly in post-filter Flow mode or under Gain control
  • Rez CV— Controls resonance intensity through the Rez CV attenuverter and breaks the upstream CV normalling when patched.
  • Rez CV Attenuverter— Bipolarly scales or inverts Rez CV, with zero modulation near the centre position.
  • Audio Out— Main filtered output after the Fangs clipping stage; level and character depend on input level, Gain, Rez, Flow, and Fangs settings.
  • Freak CV Attenuverter— Bipolarly scales or inverts Freak CV, with zero modulation near the centre position.
  • Gain CV Attenuverter— Bipolarly scales or inverts Gain CV, with zero modulation near the centre position.
  • 1V/Oct— Unattenuated one-volt-per-octave cutoff input that sums with the Freak knob and Freak CV for key tracking or pitched self-oscillation.
  • Flow— Relocates the VCA: the upper pre-tube position places it before the tube and filter for dynamic drive, while the lower post-filter position
  • Fangs— Selects output clipping: bypass in the upper position, progressive soft clipping in the middle, or precision hard limiting at approximately
  • Filter Mode— Selects the filter response: high-pass in the upper position, band-pass in the middle, or low-pass in the lower position.
  • Gain Level Indicator— Its brightness indicates the combined Gain knob and Gain CV amount.
  • Resonance Indicator— Its brightness indicates the combined Rez knob and Rez CV amount.
  • 1V/Oct Calibration— Calibrates the filter's one-volt-per-octave cutoff tracking for accurate pitched self-oscillation and key tracking.
  • Gain— Controls the vintage VCA from zero to approximately unity gain; it sets tube drive when Flow is pre-tube and output level or Fangs drive whe
  • Rez— Sets resonance from subtle emphasis through self-oscillation and into heavily tube-compressed feedback.

How-To Guides

  • Calibrate 1V/octave tracking
  • Create a pseudo-LPG response
  • Play Vamp as a tuned voice

Explore the interactive Vamp panel on BleepDex — tap any control to learn what it does.

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