Vostok Instruments Sena
Quad 3340 oscillator with per-channel wave modifiers and a 4-color noise bank.
14 HP Eurorack module
Sena packs four fully-analog 3340-core VCOs into 14HP, each with a dedicated wave modifier — channel 1's sine drives a two-stage Folder, channel 2's triangle hits a Trapezoid Shaper, channel 3's saw goes through a Phase modulator, and channel 4's square has a half-range PWM. Every channel has its own FREQ knob, V/Oct vs linear FM input switching, a Fine-tune toggle (six octaves vs ±2 semitones), and a VCO/LFO mode switch — so any channel can become a slow shaped modulator with the same wave-modifier processing. The bottom-mounted Noise Bank adds four analog noise colors (white, pink, blue, brown). V/Oct tracking is calibrated over 8 octaves; FREQ inputs are buffered and daisy-chained, so one pitch CV plays the whole module.
Features
- Four fully-analog 3340-core VCOs in 14HP
- Dedicated wave modifier on each channel: FOLD (sine), SHAPE (tri), PHASE (saw), PWM (sq)
- Manual + CV control on each modifier — pot turns into attenuator when CV is patched
- 1 V/Oct tracking calibrated over 8 octaves
- Per-channel V/Oct vs linear FM input switch
- Per-channel FINE switch — six octaves or ±2 semitones FREQ knob range
- Per-channel VCO/LFO mode switch (LFO mode: ~0.15 Hz to 10 Hz)
- Daisy-chained FREQ inputs with onboard buffers — one CV controls all four oscillators
- Front-panel LED frequency indicator per channel
- Analog noise bank: White, Pink, Blue, Brown — four simultaneous outputs
- 100 kΩ input / 1 kΩ output impedance
- 30 mm skiff-friendly depth
Controls & Jacks (40)
- Ch 1 FREQ
- Ch 1 LED
- Ch 2 LED
- Ch 3 LED
- Ch 4 LED
- Ch 1 V/O-FM
- Ch 1 FINE
- Ch 2 V/O-FM
- Ch 2 FINE
- Ch 3 V/O-FM
- Ch 3 FINE
- Ch 4 V/O-FM
- Ch 4 FINE
- Ch 1 FOLD
- FREQ CV 1 In
- FOLD CV 1 In
- Ch 1 Out
- Ch 1 VCO/LFO
- Ch 2 SHAPE
- Ch 2 FREQ
- FREQ CV 2 In
- SHAPE CV 2 In
- Ch 2 Out
- Ch 2 VCO/LFO
- Ch 3 FREQ
- Ch 3 Out
- PHASE CV 3 In
- Ch 3 PHASE
- FREQ CV 3 In
- Ch 3 VCO/LFO
- FREQ CV 4 In
- PWM CV 4 In
- Ch 4 Out
- Ch 4 FREQ
- Ch 4 PWM
- Ch 4 VCO/LFO
- Noise Blue Out
- Noise White Out
- Noise Pink Out
- Noise Brown Out
How-To Guides
- Detuned Quad Sine Pad
- Noise-Bank Percussion Kit
- Channel 4 as a Shaped LFO
- Linear FM via the V/O-FM Switch
- Saw Phase Drone (Ch 3)
Explore the interactive Sena panel on BleepDex — tap any control to learn what it does.
