User Manual for INSTRUOMo models including: cn c Function Generator, cn c, Function Generator, Generator
cnōc | Instruo
2022-08-31 — The Instruō cnōc is a fully analogue voltage-controlled two stage function generator. This style of function generator was pioneered by.
2 Contents 3 Description / Features 4 Installation / Specifications 5 Overview 6 Signal I/O 7 Function Generator 9 Patch Examples - West Coast Synth Voice - East Coast Synth Voice
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DocumentDocumentcnc Function Generator User Manual Contents 3 Description / Features 4 Installation / Specifications 5 Overview 6 Signal I/O 7 Function Generator 9 Patch Examples - West Coast Synth Voice - East Coast Synth Voice - CV Slew Limiter - Quadrature Moulation 2 Description The Instru cnc is a fully analogue voltage-controlled two stage function generator. This style of function generator was pioneered by the West-coast mindset of sound synthesis and goes far beyond the functionality of a traditional envelope generator. With AR, ASR, and Looping modes, as well as its unipolar positive and bipolar outputs, cnc finds its home in any patch. Whether you need a general envelope generator, LFO, delayed gate signal, or a slew limiter to add portamento to your pitch sequences, cnc fits the bill. Features · AR, ASR, and Looping envelope modes · External control over Attack and Release stages · Unipolar positive and bipolar outputs · Assignable gate output · Manual trigger button · Slew limiting functionality · Two response curve settings 3 Installation · Confirm that the Eurorack synthesizer system is powered off. · Locate 4 HP of space in your Eurorack synthesizer case. · Connect the 10 pin side of the IDC power cable to the 2x5 pin header on the back of the module, confirming that the red stripe on the power cable is connected to -12V. · Connect the 16 pin side of the IDC power cable to the 2x8 pin header on your Eurorack power supply, confirming that the red stripe on the power cable is connected to -12V. · Mount the Instru cnc in your Eurorack synthesizer case. · Power your Eurorack synthesizer system on. Note: This module has reverse polarity protection. Inverted installation of the power cable will not damage the module. Specifications · Width: 4 HP · Depth: 27mm · +12V: 45mA · -12V: 40mA 4 cnc | kn·Uk | noun (landscape) a natural elevation or raised landscape; an accumulated heap or mound ± OUT + 23 EOC 4 GATE 5 7 6 8 10 A R 9 11 12 13 1 IN cnc Key 1. Signal Input 2. Bipolar Output 3. Unipolar Positive Output 4. EOC Output 5. Gate Output 6. Stage Gate Toggle 7. Response Curve Switch 8. Attack Fader 9. Attack CV Input 10. Release Fader 11. Release CV Input 12. Mode Toggle 13. Trigger/Charge Direction Button 5 Signal I/O Signal: The Signal input is a bipolar input used for function generation. · A trigger or gate signal present at the Signal input will ping an envelope at the Bipolar and Unipolar Positive outputs. · If the Mode toggle is set to ASR Mode, a control voltage signal present at the Signal input will be slewed at the Bipolar and Unipolar Positive outputs based on the settings of the Attack and Release faders (See the Mode, Attack, and Release sections for more information). Bipolar: The Bipolar output is a bipolar control voltage output. · Output range: 10Vpp. Unipolar Positive: The Unipolar Positive output is a unipolar positive control voltage output. · Output range: 0V - 10V. EOC: The EOC output will output a 1ms trigger signal at the end of each cycle. · Output voltage: 10V. Gate: The Gate output will output a gate signal for the duration of either the Attack stage or the Release stage, based on the position of the Gate Mode toggle. · Output voltage: 10V. Stage Gate: The Stage Gate toggle determines whether the gate signal present at the Gate output is in relation to the Attack stage or the Release stage. 6 Function Generator Response Curve: The Response Curve switch controls the contour of the function. · Setting the switch to its left position will set the function to a linear response curve. · Setting the switch to its right position will set the function to a logarithmic/exponential response curve. · This setting will have a logarithmic Attack stage and an exponential Release stage. Attack: The Attack fader defines the onset duration of the function. The value set by this control is measured in the time domain. · Moving the fader upward will increase the attack time. · Moving the fader downward will decrease the attack time. · The fader's LED will illuminate with ascending voltage. Attack CV: The Attack CV input is a bipolar control voltage input for the Attack parameter. · Control voltage is summed with the fader position. Release: Once the Attack stage has completed, the Release fader defines the time it takes for the function to to return to its starting voltage. · Moving the fader upward will increase the release time. · Moving the fader downward will decrease the release time. · The fader's LED will illuminate with descending voltage. Release CV: The Release CV input is a bipolar control voltage input for the Release parameter. · Control voltage is summed with the fader position. 7 Mode: The Mode toggle sets the function mode. · If the toggle is in the left position, the function is set to ASR (Attack/ Sustain/Release) Mode. · If the toggle is in the centre position, the function is set to AR (Attack/ Release) Mode. · If the toggle is in the right position, the function is set to Looping Mode. · Cycle times in Looping Mode range between ~1ms (oscillation of ~1 kHz) and ~20s (oscillation of ~0.05 Hz). Trigger/Charge Direction: Pressing the Trigger/Charge Direction button will manually trigger the function. It will also control a manual soft synchronization of the function's charge direction. 8 Patch Examples West Coast Synth Voice: Summary: A sequencer sends voltage to the oscillator while simultaneously triggering cnc. The Unipolar Positive output of cnc opens the wavefolder, allowing the oscillator signal to pass through. 1V/Oct Signal Output Gate Signal Audio Path: · Connect the sine waveform of an oscillator to the audio input of a wavefolder. · Monitor the audio output of the wavefolder. · Set the wavefold amount of the wavefolder to its minimum position. · Set the symmetry bias of the wavefolder to a desired position. 9 Control Path: · Connect the 1V/Oct output of a sequencer to the 1V/Oct input of the oscillator. · Connect the gate output of the sequencer to the Signal input. · Set the Mode toggle to AR Mode. · Set the Response Curve switch to a desired position. · Connect the Unipolar Positive output to the CV input of the wavefolder and set the corresponding CV attenuator to a desired position. · Set the Attack and Release faders to desired positions. 10 East Coast Synth Voice: Summary: A keyboard sends voltage to the oscillator while simultaneously triggering cnc. The Unipolar Positive output of cnc opens the filter and VCA, allowing the oscillator signal to pass through. More traditional East Coast patches would incorporate separate cnc modules for the filter and VCA. Gate Signal 1V/Oct Signal Output Audio Path: · Connect the desired waveform of an oscillator to the audio input of a filter. · Connect the audio output of the filter to the audio input of a VCA. · Monitor the audio output of the VCA. · Set the fundamental frequency of the oscillator to a desired position. · Set the cutoff frequency of the filter to a desired position. · Set the resonance of the filter to a desired position. · Set the level of the VCA to its minimum position. 11 Control Path: · Connect the 1V/Oct output of a keyboard to the 1V/Oct input of the oscillator. · Connect the gate output of the keyboard to the Signal input. · Set the Mode toggle to ASR Mode. · Set the Response Curve switch to its right position. · Connect the Unipolar Positive output to a multiple. · Connect one copy of the cnc CV signal to the cutoff frequency CV input of the filter and set the corresponding CV attenuator to a desired position. · Connect a second copy of the cnc CV signal to the CV input of the VCA and set the corresponding CV attenuator to a desired position. · Set the Attack and Release faders to desired positions. 12 CV Slew Limiter: Summary: Adapting the West Coast Synth Voice A sequencer's voltage is slewed through cnc, creating a portamento (glide) effect between successive notes. Output Gate Signal 1V/Oct Signal Audio Path: · Connect the sine waveform of an oscillator to the audio input of a wavefolder. Control Path: · Instead of connecting the 1V/Octave output of the sequencer directly to the 1V/Octave input of the oscillator, connect it to the Signal input of a secondary cnc. 13 · Set the Mode toggle to its left position to select ASR Mode. · Set the Response Curve switch to a desired position. Setting the switch to its left position to select a linear response curve will yield more obvious results. · Connect the Unipolar Positive output to the 1V/Octave input of the oscillator. · Set the Attack and Release faders to desired positions. The Attack fader will set the amount of portamento between ascending notes, while the Release fader will set the amount of portamento between descending notes. 14 Quadrature Modulation: Summary: This patch uses two cnc modules. The first cnc is set to generate a one-shot triangle waveform function. A gate signal generated during the release stage triggers a second cnc that is also set to generate a one-shot triangle waveform. A gate signal generated during the release stage of the second cnc retriggers the first cnc. This method of circular patching creates two triangle waveforms that are 90 degrees out of phase from one another. Both cnc modules also continuously retrigger each other. One triangle waveform controls the amount of wavefolding while the other triangle waveform the amount of filtering, creating a quadrature, dual timbral modulation. Output 15 Audio Path: · Connect the sine waveform of an oscillator to the audio input of a wavefolder. · Connect the audio output of the wavefolder to the audio input of a filter. · Monitor the audio output of the filter. · Set the fundamental frequency of the oscillator to a desired position. · Set the wavefold amount of the wavefolder to a desired position. · Set the symmetry bias of the wavefolder to a desired position. · Set the cutoff frequency of the filter to a desired position. · Set the resonance of the filter to a desired position. Control Path: · Set the Response Curve switch of both cnc's to their left positions to select linear response curves. · Set the Mode toggles of both cncs to their left positions to select AR Mode. · Set the Attack and Release faders of both cnc to equal positions to create triangle waveform functions. · Set the Stage Gate toggles of both cnc's to their right positions to create gate signals at the Gate outputs during their release stages. · Connect the Gate output of the first cnc to the Signal input of the second cnc. · Connect the Gate output of the second cnc to the Signal input of the first cnc. · Connect the Unipolar Positive output of the first cnc to the CV input of the wavefolder to control the amount of wavefolding and set the corresponding CV attenuator to a desired position. · Connect the Unipolar Positive output of the second cnc to the FM input of the filter and set the corresponding FM attenuator to its desired position. 16 Manual Author: Collin Russell Manual Design: Dominic D'Sylva This device meets the requirements of the following standards: EN55032, EN55103-2, EN61000-3-2, EN61000-3-3, EN62311. 17Adobe PDF Library 16.0.7 Adobe InDesign 17.2 (Macintosh)