vostok-instruments-halo

Vostok Instruments Halo

Quad LFO with logic — 16 simultaneous modulators in 10HP.

10 HP Eurorack module

Halo is a compact quad LFO designed to pack a huge amount of modulation into 10HP. Each of the four channels delivers an independent triangle and square output at rates from sub-audio (0.008 Hz, ~2 minutes per cycle) up to 80 Hz, with bipolar 10Vpp CV input that sums with the FREQ knob. A two-section analog logic block then processes channel pairs (1–2 and 3–4): each pair gets AND, OR, XOR, and MIX outputs derived from whichever waveform (triangle or square) each channel sends into the logic section. Result: 16 simultaneous modulation signals from one 10HP module.

Features

  • Four independent analog LFO channels in 10HP
  • Frequency range from 0.008 Hz (~2 min) to 80 Hz
  • Two-position LO/HI range switch per channel
  • Simultaneous triangle and square outputs per channel
  • Bipolar 10Vpp FREQ CV input per channel
  • FREQ CV is normalled down the chain — one CV controls all four channels
  • Two analog logic sections (one per channel pair 1-2 and 3-4)
  • AND output — minimum/lower of the pair (downward modulation patterns)
  • OR output — maximum/higher of the pair (upward modulation patterns)
  • XOR output — unipolar 0-10V difference (great for gate-like patterns)
  • MIX output — analog sum of both channel waveforms
  • Per-channel logic waveform select (triangle or square into logic)

Controls & Jacks (36)

  • Ch 1 FREQ
  • Ch 1 Range
  • Ch 1 Logic Select
  • Ch 1 LED
  • Ch 2 Range
  • Ch 2 Logic Select
  • Ch 2 LED
  • Ch 3 Range
  • Ch 3 Logic Select
  • Ch 3 LED
  • Ch 4 Range
  • Ch 4 Logic Select
  • Ch 4 LED
  • Ch 1 Triangle Out
  • Ch 1 Square Out
  • FREQ CV 1 In
  • FREQ CV 2 In
  • Ch 2 Square Out
  • Ch 2 Triangle Out
  • Ch 2 FREQ
  • FREQ CV 3 In
  • Ch 3 Triangle Out
  • Ch 3 Square Out
  • Ch 3 FREQ
  • FREQ CV 4 In
  • Ch 4 Triangle Out
  • Ch 4 Square Out
  • Ch 4 FREQ
  • Logic 1-2 AND Out
  • Logic 1-2 MIX Out
  • Logic 1-2 OR Out
  • Logic 1-2 XOR Out
  • Logic 3-4 AND Out
  • Logic 3-4 MIX Out
  • Logic 3-4 OR Out
  • Logic 3-4 XOR Out

How-To Guides

  • Warm Filter Sweep
  • AND/OR Rhythm From Two Square LFOs
  • One CV Drives All Four Channels
  • XOR for Generative Gate Density
  • Stereo Random Motion From MIX Outputs

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

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