noise-engineering-cursus-iteritas-percido

Noise Engineering Cursus Iteritas Percido

Dangerous wavetable voice with one knob to rule them all

24 HP Eurorack module

Cursus Iteritas Percido is a 24HP Eurorack wavetable oscillator synth voice that builds timbres from orthogonal function sets (Fourier, Daubechies wavelets, Walsh transforms), with a built-in attack/decay envelope routed to all timbral parameters via individual attenuverters. The Master Blaster macro knob controls all envelope sends simultaneously, making it a powerhouse performance instrument capable of anything from massive kicks to lush organs.

Features

  • Wavetable oscillator with three selectable orthogonal function sets: Fourier (sine), Daubechies (wavelets), Walsh (Walsh transforms)
  • Built-in attack/decay envelope with Time, AT/DC, and Shape controls
  • Individual envelope send attenuverters for each timbral parameter (Center, Width, Balance, Edge, Fold) and Pitch
  • Master Blaster macro knob scales all envelope sends simultaneously for live performance
  • MB Out CV output mirrors Master Blaster position for controlling external modules
  • Env Out CV output sends internal envelope to external modules
  • Sync input for edge-based oscillator reset
  • Trig input resets envelope in any mode on rising edge
  • Hit button for manual triggering without external CV
  • Variable sample rate tied to oscillator fundamental to make aliasing harmonic
  • Fold wavefolder for additional harmonic complexity
  • Edge control interpolates from point sampling to cubic-spline (NURBS) oversampling

Controls & Jacks (49)

  • Balance— Allows selection of harmonics included in the output.
  • Center Envelope Send— Envelope send control for Center. Routes the internal attack/decay envelope to Center parameter. 12:00 = off, CCW = negative, CW = positive.
  • Pitch— Sets the pitch. Turn to adjust fine tuning, press and turn to adjust coarse tuning. Encoder sums with the pitch CV input.
  • Edge— Controls the oversampling filter of the wavetable. As this is turned to the right, it will add musical overtones.
  • Width— Controls how many different harmonics are used to create the wavetable.
  • Algo— Selects which orthogonal function set is used to produce the wavetable: Daubechies (wavelets), Fourier (sine waves), or Walsh (Walsh Transfo
  • Fold— Wavefolder control that adds harmonic content and distortion.
  • Center— Selects the center harmonic used to build the wavetable.
  • Shape— Controls the shape of the envelope curve: CCW = exponential, center = linear, CW = logarithmic.
  • Edge Envelope Send— Envelope send control for Edge. Routes the internal attack/decay envelope to Edge parameter. 12:00 = off, CCW = negative, CW = positive.
  • Time— Controls the length of the envelope.
  • AT/DC CV— CV input for AT/DC control. Responds to 0V to 5V.
  • Env Out— Output to send the internal envelope to other modules. Outputs 0V to 5V.
  • Edge Envelope Send CV— CV input for Edge envelope send amount.
  • Width Envelope Send— Envelope send control for Width. Routes the internal attack/decay envelope to Width parameter. 12:00 = off, CCW = negative, CW = positive.
  • Center Envelope Send CV— CV input for Center envelope send amount.
  • Balance Envelope Send— Envelope send control for Balance. Routes the internal attack/decay envelope to Balance parameter. 12:00 = off, CCW = negative, CW = positiv
  • Algo CV— CV input for algorithm selection. Voltage selects between Daubechies, Fourier, and Walsh.
  • AT/DC— Controls the attack and decay of the envelope. CCW = all decay, CW = attack dominates, center = balanced.
  • Balance CV— CV input for Balance control. Responds to 0V to 5V.
  • Edge CV— CV input for Edge control. Responds to 0V to 5V.
  • Mode— Sets the behavior of the envelope: Trigger mode (expects trigger input), Loop mode (envelope regenerates), or Free-running mode (original Cu
  • Master Blaster— Performance-oriented master attenuverter for all envelope sends. 12:00 = all sends off, CW = full amount, CCW = inverted amount.
  • Center CV— CV input for Center harmonic selection. Responds to 0V to 5V.
  • Sync— Triggers edge-based oscillator reset. Responds to a rising edge around 2V.
  • Master Blaster CV— CV input for Master Blaster attenuverter.
  • Fold Envelope Send— Routes the internal attack/decay envelope to the Fold parameter. At 12:00, envelope is off. CW adds positive envelope, CCW adds inverted env
  • Pitch CV— CV input for pitch control. Responds to 0V to 8V.
  • Fold Envelope Send CV— CV input for Fold envelope send amount.
  • Width Envelope Send CV— CV input for Width envelope send amount.
  • MB Out— CV output based on the position of the Master Blaster knob to send to other modules. Outputs 0V to 5V.
  • Time CV— CV input for Time control. Responds to 0V to 5V.
  • Width CV— CV input for Width control. Responds to 0V to 5V.
  • Fold CV— CV input for Fold control. Responds to 0V to 5V.
  • Trig— Input to trigger CIP. The envelope also resets when CIP receives a trigger. Responds to a rising edge around 3V.
  • Audio Out— AC-coupled audio output.
  • Mode CV— CV input for Mode selection. Responds to 0V to 5V.
  • Shape CV— CV input for Shape control. Responds to 0V to 5V.
  • Hit— Momentary button to manually trigger CIP. When depressed, CIP behaves like it received a rising edge on a trigger.
  • Balance Envelope Send CV— CV input for Balance envelope send amount.
  • Output LED 1— Indicates output signal activity.
  • Algo LED— Indicates current algorithm selection (Fourier position).
  • Mode LED— Indicates current envelope mode (Trig/Loop/Free).
  • Output LED 2— Indicates output signal activity.
  • Center Envelope— Envelope send control for Center. Routes the internal attack/decay envelope to Center parameter. 12:00 = off, CCW = negative, CW = positive.
  • Width Envelope— Envelope send control for Width. Routes the internal attack/decay envelope to Width parameter. 12:00 = off, CCW = negative, CW = positive.
  • Balance Envelope— Envelope send control for Balance. Routes the internal attack/decay envelope to Balance parameter. 12:00 = off, CCW = negative, CW = positiv
  • Edge Envelope— Envelope send control for Edge. Routes the internal attack/decay envelope to Edge parameter. 12:00 = off, CCW = negative, CW = positive.
  • Fold Envelope— Envelope send control for Fold. Routes the internal attack/decay envelope to Fold parameter. 12:00 = off, CCW = negative, CW = positive.

How-To Guides

  • Big Kick Drum
  • Synth Bass
  • Organ Voice
  • Master Blaster Macro Performance
  • Self-Cycling Drone
  • Wavefolded Crunch Lead
  • Envelope CV Source
  • Pitched Percussion Melody
  • Generative Timbre Sequencing

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

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