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Summary of Contents for Instruo athru
- Page 1 athrú Wavefolder User Manual...
- Page 2 Contents Description / Features Installation / Specifications Overview Wavefolding Patch Examples West Coast Synth Voice West Coast Bongo Summed Wavefolder Burst Generator...
- Page 3 Description The Instruō athrú is a full featured analogue wavefolder that creates incredibly complex timbres from very basic waveforms using an interesting form of distortion. Unlike traditional distortion effects where signal amplitudes passing a threshold are ‘clipped’ , wavefolding inverts signal amplitude when it passes an amplitude threshold.
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Page 4: Installation
Installation 1. Confirm that the Eurorack synthesizer system is powered off. 2. Locate 4 HP of space in your Eurorack synthesizer case. 3. 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. - Page 5 athrú | 'ɑ:ɾ·u: | verb (mathematics) an act or process through which something becomes different; to change, transform, alteration, variation and mutation Front Back BIAS DRIVE athrú 1. Input 7. Symmetry Bias Switch 2. Output 8. Symmetry Bias Attenuverter 3. Wavefold 9.
- Page 6 Wavefolding Input: DC coupled signal input. Output: DC coupled signal output. Wavefold: Wavefold fader controls the amount of wavefolding applied to the signal present at the Input. The folded signal is present at the Output. • Moving the fader fully downwards will reduce the Input signal’s amplitude, resulting in near-silence.
- Page 7 Symmetry Bias Switch: Symmetry Bias Switch changes the behavior of the Symmetry Bias Attenuverter. Symmetry Bias Attenuverter: Symmetry Bias Attenuverter function in two ways depending on the position of the Symmetry Bias Switch. Symmetry Bias When the switch is in the down position, the BIAS Attenuverter functions as an attenuverter for incoming control...
- Page 8 Strike Input: Strike Input A gate or trigger signal present at the will momentarily activate the wavefolder. Strike Decay: The decay of the Strike Input can be adjusted via the Strike Decay knob located on the back of the module. Turning the knob anticlockwise will decrease the decay time.
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Page 9: Patch Examples
Patch Examples West Coast Synth Voice: Summary: The random voltage generator sends voltages to the oscillator while simultaneously triggering the envelope generator. The CV output of the envelope generator opens athrú, allowing the oscillator signal to pass through. Output White Noise Audio Path: •... - Page 10 • Connect the gate output of the random voltage generator to the trigger input of an envelope generator. • Connect the CV output of the envelope generator to the Wavefold CV Input athrú and set the Wavefold Attenuverter to a desired positive position.
- Page 11 West Coast Bongo: Summary: The random voltage generator sends voltages to the oscillator while simultaneously striking athrú, allowing the oscillator signal to pass through. Output White Noise Audio Path: • Connect the desired waveform of an oscillator to the Input of athrú.
- Page 12 Summed Wavefolder: Summary: Two waveforms are summed via the Input Symmetry Bias Input and then sent through the wavefolder. Output White Noise Sine Wave Oscillator Audio Path: • Create a West Coast Synth Voice audio path. • Connect a desired waveform from a secondary oscillator to the Symmetry Bias Input.
- Page 13 Burst Generator: Summary: Everytime cèis is triggered, a burst of trigger signals will stike athrú allowing the oscillator signal to pass through. For added modulation, multiply the combined trigger output signal and connect it to both the Strike Input athrú and the clock input of a random voltage generator and connect the CV output of the random voltage generator to the 1V/Oct input of the oscillator.
- Page 14 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, EN6231 1.
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