noise-engineering-basimilus-iteritas-alia

Noise Engineering Basimilus Iteritas Alia

Six-oscillator drum voice from kicks to cosmic metal

10 HP Eurorack module

Basimilus Iteritas Alia is a parameterized digital drum synthesizer with roots in analog synthesis, built around six tonal oscillators and one noise oscillator in additive, pitch-envelope, or FM configurations. Its controls span waveform morphing, harmonic spread, a dynamic wavefolder, and per-oscillator envelopes, enabling everything from sub-shaking kicks and snappy snares to metallic textures and synth leads. The module is part of the Alia platform, allowing firmware swapping to any other Alia firmware via USB.

Features

  • Six tonal oscillators plus one noise oscillator in three switchable synthesis configurations
  • Skin mode: six-oscillator additive synthesis for tonal drums and synth stabs
  • Liquid mode: additive synthesis with pitch envelope for punchy kicks
  • Metal mode: pair of 3-operator phase-modulated oscillators for metallic and alien sounds
  • Morph control blends continuously through sine, triangle, saw, and square waveforms
  • Harmonic control adjusts per-oscillator decay times and amplitudes for a wide range of tonal structures
  • Spread control adjusts oscillator frequency spacing from purely harmonic to inharmonic
  • Dynamic infinifold wavefolder with amplitude compensation and automatic multi-stage expansion
  • Fold top quarter mixes in pulse train for additional harmonic content
  • Attack control adds noise when left of center, produces analog-style pop at center, slows attack when right of center
  • Variable sample rate tied to fundamental oscillator frequency for musical aliasing
  • Envelope output (0V to +5V) mirrors internal envelope shape for modulating other modules

Controls & Jacks (23)

  • Pitch— Encoder for adjusting pitch. Press and turn for coarse semitone adjustments, or just turn for fine tuning. Calibrated for 1v/octave tracking
  • Morph— Morph knob and CV control the waveform of all oscillators, blending continuously through sine, triangle, saw, and square. Offsets the CV inp
  • Spread— Spread knob and CV control the frequency spacing of the oscillators, allowing the overtone series to vary from purely harmonic to very inhar
  • Fold— Fold knob and CV control the infinifold section. For the first 3/4 of range sets the threshold of the folder. In the top quarter, a pulse tr
  • Out— Main audio output. Low-impedance source with variable output level (max ~14V peak-to-peak) depending on parameterization.
  • Attack CV— CV input for attack envelope control. Range: 0V to +5V. Knob offsets this input.
  • Attack— Attack knob adjusts the attack envelope for all oscillators. When left of center, noise is added. At center, produces a classic analog-style
  • Morph CV— CV input for waveform morphing. Range: 0V to +5V. Knob offsets this input.
  • Decay CV— CV input for decay envelope control. Range: 0V to +5V. Knob offsets this input.
  • Pitch CV— CV input for pitch control. Range: -2V to +5V, calibrated for 1v/octave.
  • Env Out— Envelope output that mimics the envelope shape of BIA's internal envelope. Range: 0V to +5V.
  • Decay— Decay knob adjusts the decay envelope for all oscillators. Offsets the CV input.
  • Harmonic— Harmonic knob and CV control the harmonic decay of the oscillators. Fully left produces a single harmonic tone. As increased, more harmonics
  • Bass/Alto/Treble— Changes the pitch of the voice. Each switch position offsets the pitch by two octaves.
  • Harmonic CV— CV input for harmonic decay control. Range: 0V to +5V. Knob offsets this input.
  • Fold CV— CV input for wavefolder control. Range: 0V to +5V. Knob offsets this input.
  • Skin/Liquid/Metal— Selects the synthesis algorithm. Skin: six-oscillator additive. Liquid: six-oscillator additive with pitch envelope. Metal: pair of 3-operat
  • Hit— Manual button to activate the envelope.
  • Spread CV— CV input for oscillator spread control. Range: 0V to +5V. Knob offsets this input.
  • Trig— Trigger/gate input to activate the envelope. Threshold around +1.8V.
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  • Morph— Morph knob and CV control the waveform of all oscillators, blending continuously through sine, triangle, saw, and square. Offsets the CV inp

How-To Guides

  • Simple Kick
  • Simple Snare
  • Simple Hat
  • Simple Clap
  • Supersaw Synth Lead
  • Not-Quite-FM Bass
  • Alien Metallic Texture
  • BIA as Envelope Modulation Source
  • Audio Rate Trigger Drone
  • Full Drum Kit via CV Morphing

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

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