Vostok Instruments Fuji
Six channels of analog slope — AD, AHR, or bipolar LFO per channel in 10HP.
10 HP Eurorack module
Fuji puts six independent fully-analog slope generators in 10HP. Each channel runs as either a snappy AD envelope (logarithmic attack + exponential decay, 1.5 ms to 1.5 s per stage), an AHR envelope where hold-time follows the gate length, or as a bipolar LFO (±8 V) whose shape and frequency come from the Attack and Decay pots together. Gate inputs are daisy-chained, so one trigger can fire every channel in unison unless broken by another patch lower in the chain. Total output level is 8 V unipolar (AD/AHR) or ±8 V (LFO).
Features
- Six independent fully-analog slope generators in 10HP
- Attack range: 1.5 ms to 1.5 s (logarithmic)
- Decay range: 1.5 ms to 1.5 s (exponential)
- AD mode — two-stage envelope (default)
- AHR mode — hold stage equals gate length
- LFO mode — bipolar (±8 V) oscillator using Attack+Decay pots for shape and rate
- Daisy-chained gate inputs — one cable fires multiple channels
- Per-channel mode switches (Hold and LFO)
- Per-channel LED indicator
- 8 V output level (unipolar AD/AHR), ±8 V (LFO)
- Gate threshold 1.5 V
- 30 mm skiff-friendly depth
Controls & Jacks (42)
- Ch 2 LED
- Ch 5 LED
- Ch 4 LED
- Ch 3 LED
- Ch 1 LED
- Ch 1 Attack
- Ch 6 LFO
- Ch 6 Hold
- Ch 5 LFO
- Ch 5 Hold
- Ch 4 LFO
- Ch 4 Hold
- Ch 3 LFO
- Ch 3 Hold
- Ch 2 LFO
- Ch 2 Hold
- Ch 1 LFO
- Ch 1 Hold
- Ch 6 LED
- Ch 1 Decay
- Gate 1 In
- Ch 1 Out
- Ch 2 Attack
- Ch 2 Decay
- Ch 2 Out
- Gate 2 In
- Ch 3 Decay
- Ch 3 Attack
- Ch 3 Out
- Gate 3 In
- Ch 4 Attack
- Ch 4 Out
- Ch 4 Decay
- Gate 4 In
- Ch 5 Out
- Gate 5 In
- Ch 5 Attack
- Ch 5 Decay
- Ch 6 Out
- Gate 6 In
- Ch 6 Decay
- Ch 6 Attack
How-To Guides
- Six-Voice Drum Envelopes
- AHR Mode for Player-Controlled Pad Tails
- Six Free-Running LFOs
- Daisy-Chain With Independent Mid-Chain Trigger
- Mix AD and LFO Channels for Evolving Modulation
Explore the interactive Fuji panel on BleepDex — tap any control to learn what it does.