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Summary of Contents for Instruo cruinn
- Page 1 cruïnn Analogue Stereo Oscillator User Manual...
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Page 2: Table Of Contents
Contents Patch Examples Description / Features East Coast Synth Voice - Super Saw Synth Voice Installation / Specifications - Stereo Super Saw - FM Synth Voice - Apocalypse Helicopter Overview Waveforms & Frequency/Pitch Frequency Modulation Amplitude Modulation Phase Modulation Waveform & CV Expansion... - Page 3 Description The Instruō cruïnn is an analogue stereo oscillator that utilises through- zero phase modulation to create deep, animated textures. On top of its single sawtooth oscillator core, cruïnn produces five additional parallel phase-displaced sawtooth variants – each controlled by their own discrete internal triangle waveform LFO. With both on-board and external control over the LFO rates and modulation depths, cruïnn...
- Page 4 Installation 1. Confirm that the Eurorack synthesizer system is powered off. 2. Locate 14 HP of space in your Eurorack synthesizer case. Locate an additional, but optional 4 HP of space in your Eurorack synthesizer case for the included expander. 3.
- Page 5 cruïnn | kɾ·i:nºʲ | adjective (shape) well developed in all aspects; complete and balanced, plump, fat, full-toned or sonorous Module Expander ±360º α LEVEL RATE β MODULATION Σ γ δ DEPTH ε FINE ζ COARSE 1V/OCT cruïnn 1. Left Output 12.
- Page 6 Waveforms Right: Right jack outputs bipolar sawtooth waveforms 1, 2, and 3. Left: Left jack outputs bipolar sawtooth waveforms 4, 5, and 6. Σ Σ Sigma ( ): Sigma ( ) jack outputs of all bipolar sawtooth waveforms. Frequency / Pitch Coarse: Coarse knob controls the fundamental frequency...
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Page 7: Frequency Modulation
Frequency Modulation input is a bipolar control voltage input for the frequency parameter. • FM Attenuator Control voltage is scaled by the and summed with Coarse Fine the values set by the knobs as well the value set by 1V/Octave input. -
Page 8: Amplitude Modulation
Amplitude Modulation Level: Level knob determines the amplitude of the stereo Σ Sigma ( ) outputs. • Turning the knob anticlockwise will decrease the output amplitude. • Turning the knob clockwise will increase the output amplitude. • To eliminate any chance of hard clipping that may occur when parallel sawtooth waves sum with perfect phase alignment, a soft clipping circuit is implemented and limits the amplitude range to ~10Vpp. -
Page 9: Phase Modulation
Phase Modulation Rate: Rate knob controls the rate of the five triangle waveform LFOs used for phase modulation of the five phase-displaced sawtooth variants. • Turning the knob anticlockwise will decrease the rate of the triangle waveform LFOs down to stalling. •... - Page 10 Rate Modulation CV: Rate Modulation CV input is a bipolar Rate control voltage input for the parameter. • Control voltage is summed with the Rate knob position. Rate Modulation CV Attenuator: Rate Modulation CV Attenuator Rate determines the depth of modulation applied to the parameter.
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Page 11: Waveform & Cv Expansion
Waveform and CV Expansion Individual Waveform: Individual Waveform outputs provide discrete access to the core sawtooth waveform, as well as the five parallel phase-displaced sawtooth waveform variants. • Individual Waveform outputs are unipolar positive. Individual Rate Modulation: Individual Rate Modulation inputs are bipolar control voltage inputs for the Rate... -
Page 12: Patch Examples
Patch Examples East Coast Synth Voice: Summary: The sequencer or keyboard sends voltages to cruïnn while simultaneously triggering the envelope generator. The CV output of the envelope generator opens a filter and VCA, allowing cruïnn pass through. More traditional East Coast patches would incorporate separate envelope generators for the filter and VCA. - Page 13 • Set the cutoff frequency of the filter to a desired position. • Set the resonance of the filter to a desired position. • Set the gain of the VCA to its minimum position if applicable. Control Path: • Connect the 1V/Oct output of a sequencer or keyboard to the 1V/Oct...
- Page 14 Super Saw Synth Voice: Summary: The sequencer or keyboard sends voltages to cruïnn while simultaneously triggering the envelope generator. The CV output of the envelope generator opens a filter and VCA, allowing cruïnn to pass through. Depth Rate parameters are increased to apply phase modulation.
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Page 15: Output
Stereo Super Saw Synth Voice: Summary: The sequencer or keyboard sends voltages to cruïnn while simultaneously triggering the envelope generator. The CV output of the envelope generator opens two VCAs, allowing cruïnn to pass through. Two LFOs modulate the cutoff frequencies of two filters, creating a stereo Depth Rate modulation. -
Page 16: Audio Path
Audio Path: • Create an East Coast Synth Voice audio path using the Left Right outputs. • Use two filters and two VCAs instead of one filter and one VCA • Set the Depth knob to around 3:00. • Set the Rate knob to around 10:00. -
Page 17: Create An East Coast Synth Voice Control Path
FM Synth Voice: Summary: The secondary oscillator, called the Modulator in an FM patch, is modulating the frequency of cruïnn, called the Carrier in an FM patch. The sequencer or keyboard sends voltages to cruïnn while simultaneously triggering the envelope generator. The CV output of the cruïnn’s envelope generator opens the filter and VCA, allowing signal... -
Page 18: Apocalypse Helicopter
Apocalypse Helicopter: Summary: This patch utilizes phase modulation, frequency modulation, and unbalanced amplitude modulation to create a helicopter sound effect. (triangle) Output (sine) Audio Path: • Set the toggle to its up position, so that the module oscillates at audio rate. •... - Page 19 Control Path: • Connect a triangle waveform LFO to the Level input and set the Level CV input fully clockwise. • Connect a sine waveform LFO with the same rate and phase as the previously used triangle waveform LFO to the input and set the FM Attenuator to 1:00.
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