Sena – Multi Channel Sound Source
Oscillators are the beating heart of any modular system — and with Sena, that heart has four fully independent cores, each with its own frequency control, waveform, and dedicated timbral shaping.

Unlike conventional VCOs where multiple waveforms share the same oscillator core, Sena assigns a separate 3340 core to each waveform: Sine, Triangle, Saw, and Square. This legendary architecture, found in synth icons like the Roland SH-101, Jupiter-6, Oberheim OB-Xa, and Sequential Prophet-5, ensures rock-solid stability, wide-range tracking, and unmistakable analog warmth.

Tuning inputs are daisy-chained, making octave jumps, chord building, and micro detuning effortless. Each waveform also gets a unique CV-controlled Modifier to push its sonic range further: a two-stage folder for Sine, a trapezoid shaper for Triangle, a phase modulator for Saw, and a half-range pulse-width modulator for Square.

Completing the package is a full analog Noise Bank offering white, pink, blue, and brown noise — perfect for percussive transients, atmospheric layers, and experimental soundscapes. Sena is more than a VCO — it’s a complete, performance-ready sound source in just 14HP.

Key Features
• Four fully independent analog VCO circuits (Sine, Triangle, Saw, Square)
• Legendary 3340 cores with 1V/Oct tracking over eight octaves
• Dedicated CV-controlled Wave Modifier per oscillator
• Daisy-chained frequency inputs with buffered distribution
• Selectable LFO mode per channel
• Analog noise bank: white, pink, blue, brown

Technical Specifications
• Size: 14HP
• Current draw: +12V 130mA / –12V 130mA / +5V 0mA
• Depth: 30mm (including power cable)
• Input impedance: 100kΩ
• Output impedance: 1kΩ
• CV input range: 10Vp-p
• Frequency pot range (FINE disabled): ~6 octaves
• Frequency pot range (FINE enabled): ~2 semitones
• LFO mode frequency range: ~0.15Hz to 10Hz

Use Cases
• Create wide stereo or layered voices with individual core detuning
• Build harmonically rich chords directly from one module
• Add complex motion by modulating each waveform’s dedicated shaper
• Combine noise sources with oscillators for percussive and textural work
• Switch channels to LFO mode for powerful modulation alongside audio

Sena is a powerhouse oscillator suite, merging precision engineering with deep timbral flexibility.