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.
