rossum-electro-music-trident

Rossum Electro-Music Trident

100% analog triple "Zing"-modulation oscillator ensemble

30 HP Eurorack module

Trident is Dave Rossum’s 100% analog "Multi-Synchronic Oscillator Ensemble": three precision VCOs that come alive when combined. A Carrier Oscillator outputs simultaneous triangle, sawtooth and pulse waves, while two Modulation Oscillators apply "Zing" modulation — mathematically akin to ring modulation, but when the oscillators are hard-synced the aharmonic sidetones transform into complex yet purely harmonic overtone spectra that evolve dramatically with each mod-oscillator parameter (frequency, symmetry, waveshape, Zing amount, and Mod 2’s phase). Each oscillator can also stand alone, and the mod oscillators can independently sync to and track the Carrier.

Features

  • 100% analog triple oscillator (one Carrier + two Modulation Oscillators)
  • Carrier provides simultaneous triangle, sawtooth and pulse outputs
  • Synchronous "Zing" modulation: ring-mod-like but purely harmonic when synced
  • Per-oscillator dedicated 1V/Oct inputs, accurate over 10 octaves
  • Coarse range 20Hz–20kHz, modulated range 0.01Hz–25kHz
  • Carrier exponential + linear FM and pulse-width modulation
  • Carrier hard-sync input (3.5V threshold)
  • Mod oscillators with continuously variable CV-controlled Symmetry
  • Per-mod-oscillator Sync and Track buttons (independent)
  • Mod 2 adds CV-controllable Phase relative to the Carrier
  • Selectable triangle/sawtooth/pulse output per mod oscillator
  • Attenuverters on every CV input for bipolar modulation

Controls & Jacks (56)

  • Sync In
  • Carrier 1V/OCT
  • Coarse Frequency
  • Expo FM Attenuverter
  • Expo FM In
  • Fine Frequency
  • Linear FM Attenuator
  • Linear FM In
  • PW Mod Attenuverter
  • PW Mod In
  • Pulse Width
  • Carrier Triangle Out
  • Carrier Sawtooth Out
  • Carrier Pulse Out
  • Mod 1 Sync
  • Mod 1 Sync LED
  • Mod 1 Track
  • Mod 1 Track LED
  • Mod 1 1V/OCT
  • Mod 1 Coarse Freq
  • Mod 1 Fine Freq
  • Mod 1 Expo FM Attenuverter
  • Mod 1 Expo FM In
  • Mod 1 Symmetry
  • Mod 1 Sym Mod Attenuverter
  • Mod 1 Sym Mod In
  • Mod 1 Zing
  • Mod 1 Zing Mod Attenuverter
  • Mod 1 Zing Mod In
  • Mod 1 Waveform
  • Mod 1 Wave LED 1
  • Mod 1 Wave LED 2
  • Mod 1 Output
  • Mod 2 Sync
  • Mod 2 Sync LED
  • Mod 2 Track
  • Mod 2 Track LED
  • Mod 2 1V/OCT
  • Mod 2 Coarse Freq
  • Mod 2 Fine Freq
  • Mod 2 Expo FM Attenuverter
  • Mod 2 Expo FM In
  • Mod 2 Symmetry
  • Mod 2 Sym Mod Attenuverter
  • Mod 2 Sym Mod In
  • Mod 2 Zing
  • Mod 2 Zing Mod Attenuverter
  • Mod 2 Zing Mod In
  • Mod 2 Phase
  • Mod 2 Phase Mod Attenuverter
  • Mod 2 Phase Mod In
  • Mod 2 Waveform
  • Mod 2 Wave LED 1
  • Mod 2 Wave LED 2
  • Mod 2 Wave LED 3
  • Mod 2 Output

How-To Guides

  • First Zing Sound
  • Dual Zing Modulation
  • Dynamic Evolving Timbres
  • Stacked / Detuned Oscillators
  • Mod Oscillator as LFO

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

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