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CESYG DUALFO, Installation And User Manual

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DUALFO Installation and User Manual

Copyright © 2012 Neil Johnson

First edition, May 2012
Revised, October 2012

All rights reserved. No part of this publication may be reproduced, stored in a retrieval
system,  or  transmitted,  in  any  form  or  by  any  means,  electronic,  mechanical,  photo-
copying, recording, or otherwise, without the prior written permission of the author.

CESYG

Web:

http://www.cesyg.com

Email: [email protected]

CESYG DUALFO USER MANUAL

Page 2

Summary of Contents for DUALFO

Page 1: ...CESYG DuaLFO Installation and User Manual Document CE 101 0002A CESYG DUALFO USER MANUAL Page 1...

Page 2: ...reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photo copying recording or otherwise without the pr...

Page 3: ...Make beautiful sound CESYG DUALFO USER MANUAL Page 3...

Page 4: ...CESYG DUALFO USER MANUAL Page 4...

Page 5: ...ions 17 Controls 17 Output waveforms 17 5 USING THE MAIN LFO 15 Sine Shape Trim VR2 15 Shape Maximum Bias Trim VR1 15 4 ADJUSTMENTS 14 Power on Test 13 Installing the DUALFO 13 Main LFO Normalising Op...

Page 6: ...CESYG DUALFO USER MANUAL Page 6...

Page 7: ...ion of the CESYG DUALFO two channel low frequency oscillator LFO for the Eurorack modular synthesizer system CESYG DUALFO USER MANUAL Page 7 Main 0 Out Main 120 Out Main 240 Out Aux Tri Out Aux Sine O...

Page 8: ...hat use reverse diodes and series resistors where during a fault the diodes conduct the full power supply current through the low values resistors until you notice a burning smell and or smoke before...

Page 9: ...ency control log scale External CV control of frequency with unipolar attenuator link selectable normalised to either auxiliary sine wave output or bus CV Auxiliary Oscillator Frequency range Approx 2...

Page 10: ...nuator left negative right positive Power Input 12V to 15V 40 50mA per rail Connector Eurorack standard 16 pin power bus connector Protection Reverse voltage protected missing rail protected Ground Du...

Page 11: ...ag of M3x6mm screws Make sure you have a space of at least 18HP 91mm in your rack unit and one spare power connection Installing the Power Cable The DUALFO is fitted with a standard 16 pin power heade...

Page 12: ...power socket on the DUALFO located at the bottom edge of the rear of the PCB Both the header and the connector are polarised to ensure that they can only mate one way As a guide note that the RED stri...

Page 13: ...sets the source to the sine wave output of the auxiliary oscillator You can change the link to select the CV line on the power bus The link is located just above the power connector Installing the DUA...

Page 14: ...provided with your DUALFO as a special option or you can purchase them either from CESYG or elsewhere Power on Test Refit the AC power cable to your synthesizer Set the DUALFO Freq controls to maximum...

Page 15: ...a diode shaper VR2 can be used to fine tune the shape of the sine wave to minimise distortion Normally this is done during assembly but if the unit is subject to excessive mechani cal shock or to a r...

Page 16: ...CESYG DUALFO USER MANUAL Page 16...

Page 17: ...s are at fixed phase offsets of 0 120 and 240 degrees Controls The Main LFO has two controls and one external control input FREQ The FREQ control provides manual control of the frequency of the Main L...

Page 18: ...amplifier and speaker arranged at equidis tant points around a circle Place yourself in the middle of the circuit and the result will be a sound that rotates around you Swap over two of the sine outpu...

Page 19: ...t 87 of the full length This tells you the amplitude of the result about 87 of the full scale signal about 4 3V If all this sounds complicated it really isn t Try it for yourself with a pencil and rul...

Page 20: ...CESYG DUALFO USER MANUAL Page 20...

Page 21: ...puts The second output is a diode shaped sine wave with distor tion below 2 The shape of the triangle wave and also the sine wave can be modulated internally or externally Controls The Auxiliary LFO h...

Page 22: ...gle wave When set to to the mid position the Auxiliary LFO generates a triangle wave With the control turned to the left the duration of the rising left edge of the triangle is short ened and vice ver...

Page 23: ...iary LFO One significant difference between the Main and Auxiliary LFOs is the Sync input Put simply the Sync input synchronises the Auxiliary LFO to an external trigger or clock signal It is switchab...

Page 24: ...CESYG DUALFO USER MANUAL Page 24...

Page 25: ...evolving sound textures Parameters that could be modulated to varying depths include VCO detuning or unison multiple VCO spreading stereo or 3D panning filter cutoffs and so on In addition synchronis...

Page 26: ...CESYG DUALFO USER MANUAL Page 26...

Page 27: ...are intended for you to make your personal notes on operat ing the DUALFO The diagram pages are intended for you to photocopy or scan and print so that you can record patch settings and phase diagrams...

Page 28: ...PATCH SHEET Name NOTES NOTES CESYG DUALFO USER MANUAL Page 28...

Page 29: ...CESYG DUALFO USER MANUAL Page 29...

Page 30: ...NOTES CESYG DUALFO USER MANUAL Page 30...

Page 31: ...de but is not limited to abusive usage fluid spills excessive voltages on inputs and or outputs Repairs for these types of damage will be charged at usual service rates The terms of this warranty do n...

Page 32: ...Service History Date Technician Details CESYG DUALFO USER MANUAL Page 32...

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