CYMA FORMA ALT 2025

Hello,

I am selling my Cyma Forma ALT analog synthesizer in absolute Mint condition. This is an extraordinary, rare, and deeply expressive machine for sonic exploration—perfect for organic textures, evolving drones, cinematic soundscapes, and generative compositions.

Purchased directly from the Parisian boutique manufacturer, it has been used exclusively in a smoke-free, climate-controlled home studio and handled with the utmost care. It is functionally flawless, and the aesthetics (powder-coated steel chassis and high-gloss transparent plexiglass panel) are pristine.

The synth comes 100% complete with everything included from the factory:

• Original box and protective packaging.
• Original 15V DC power supply.
• Dedicated metal tin containing the full set of 20 brass modulation pins (2mm).
• Original printed user manual and poster.
• Note: The machine is running the latest official firmware (featuring microtonal scales management, equal/just intonation toggle, and portamento).

Detailed Technical Specifications:

Sound Engine & Voices

• Architecture: 100% Analog synthesis.
• Polyphony: 5 independent voices (triggered via mechanical keys or sliders). Features Voice Splitting mode (4 voices) or Monophonic mode via MIDI.
• Sources: 5 distinct oscillators. 1 VCO (sine wave from 8 Hz to 8372 Hz) and 4 DCOs (ultra-stable square or triangle waves from 16 Hz to 9000 Hz).
• Noise: 1 independent white noise generator.
• Harmonic Quantizer: 14 built-in and fully customizable scales (Chromatic, Pentatonic, Pelog, Hijaz, Insen, etc.). Supports Equal Temperament or Just Intonation. Independent stereo panning for oscillators 2 to 5.
• Keyboard: 5 mechanical switches for tactile, direct amplitude triggering of each voice.

Effects & Character (Alter)

• Filters: Dual analog stereo filters in series (Sallen-Key type). Smooth crossfade transition between Low-Pass (4-pole) and High-Pass (2-pole) to achieve sharp Band-Pass filtering. Auto-oscillation at maximum resonance generates 2 additional sine voices. Performance "Ripples" buttons.
• Delay: Stereo BBD-emulated delay (analog core with digital taps), ranging from 30 ms to 1.5 s. Capable of self-oscillation and infinite feedback loops. Performance "More" button.

Modulation & Movement (Movement)

• Modulation Matrix: 4-row by 19-destination pin matrix (2mm banana plug connections).
• Modulation Sources (4):
• • 2 LFOs (morphing from square to triangle) with a "High Rate" switch for audio-rate FM and AM synthesis (up to 1190 Hz).
  • 1 Random generator (Sample & Hold) with a Slew/Glide switch and MIDI clock sync.
  • 1 Envelope Follower (Outline) with amplitude, release, and inverter controls, assignable to the built-in electret microphone or the 3.5mm external audio/CV input.
• Physical Interaction: 2 "Léon" optical sensors on the front panel to modulate pitch or volume via hand gestures (Theremin-style).

Connectivity & I/O

• Inputs: 3.5mm CV/Audio Input (Outline), Master Pitch CV Input (1V/Oct, ±5V), Master VCA Gate Input (±10V).
• MIDI: MIDI In via 3.5mm TRS Jack or USB-C (handles Pitch, Pitch Bend, Velocity, Aftertouch, and MIDI Clock).
• Outputs: Headphone Out (3.5mm TRS), Master Left/Mono & Right Outputs (2 x 6.35mm / 1/4" TS jacks).