Music - Digisound 80 Synthesizer Modules
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Image of a Digisound modular synth

Picture courtesy Kevin Lightner

Below you will find a complete (as far as I am aware) list of Digisound Project 80 modules. These are sorted by ID including the full module name and the original construction article source (where appropriate).

Click on the module ID to go to a dedicated page for that module. Each page contains a description (where available) taken from the Digisound brochure, links to pdf files of the construction articles and an image file of the PCB foil. Also included are Schaeffer-Apparatebau front panel designs for each module (both original 9 by 3 inch and MOTM-format 5U by 2U versions) and links to zipped files for the full set of construction articles and the User Guide.

Module ID Module Name Article Source
80-1 Power Supply Unit ETI Feb 1980
80-2 Voltage Controlled Oscillator ETI Feb 1980
80-3 Voltage Controlled Low Frequency Oscillator ETI Feb 1980
80-4 Voltage Controlled Mixer ETI Mar 1980
80-5 Processor ETI Mar 1980
80-6 Voltage Controlled Filter ETI May 1980
80-7 Voltage Controlled State Variable Filter ETI Jul 1980 ** /
E&MM May 1982 *
80-8 Dual ADSR ETI Jul 1980 **
80-9 Dual Voltage Controlled Amplifier ETI Aug 1980
80-10 Voltage Controlled Envelope Generator ETI Sep 1980 **
80-11 Dual Ring Modulator ETI Supplement
80-12 Noise Generator / Sample & Hold ETI Apr 1981
80-13 External Input ETI Supplement
80-14 Stereo Power Amplifier ETI Oct 1980 **
80-15 Keyboard Controller and associated units ETI Supplement **
80-16 Dual Resonant Filter E&MM Feb 1982 *
80-17 Reverberation Unit ETI Apr 1982
80-18 Dual Multi-Function Envelope Generator E&MM Dec 1981 *
80-19 Dual Voltage Controlled Low Frequency Oscillator E&MM Sep 1984
80-20 Waveform Multiplier ETI Jan 1983 **
80-21 Voltage Controlled Digital Oscillator ETI Mar 1985
80-22 Patcher Digisound
80-23 Quad Low Frequency Oscillator Digisound
80-24 Polyphonic Keyboard Controller Digisound
80-25 Midi-to-CV Converter Digisound
80-C9 Voice Card E&MM Feb/Mar 1985
Dev-91 CEM 3391 Voice Development Unit Digisound
Alphadac 16 Alphadac 16 Polyphonic Keyboard Controller E&MM Jul 1981 **

Article Sources

ETI Electronics Today International
E&MM Electronic and Music Maker
Digisound Only available as Digisound construction notes
* Indicates E&MM "Electro-Music Engineer" article

**

 No Digisound construction notes were produced - only the original source article

About the construction notes and PCB foil patterns

You are free to make use of the construction notes and PCB foil patterns linked on the individual module pages. Please, however, bear in mind the following points:

The information contained herein is supplied 'as is' without any express or implied warranty, etc. I am not responsible for any losses which might be incurred as a result of its use nor for its veracity; 
I am not in any position to create and populate (for other people) or otherwise amend the boards or the circuits which they represent - if you wish to do this, it’s entirely up to you;
The PCB foils are straight clean-ups of the original foil pattern from ETI or my own/other peoples copies of the boards - any faults in the foil patterns are left over from the original foil pattern source;
I haven't yet built and tested any of these boards for my own use so please check them carefully against a reliable source before making up your boards;
The image files are not saved at the correct size for the board (I have left the images as large as possible from the time when I worked on them) so you will need to ensure that you resize the image appropriately if you plan on using these to generate negatives for etching (the original board size is noted on the appropriate module’s page);
I continue to work on the image files for those boards currently without an associated image file - albeit not as often as I used to - so, if you want copies of raw/untreated files or works in progress, then drop me a line at dave@NO_SPAM_digisound80.co.uk (removing the "NO_SPAM_").
Copyright Notice

The original magazine construction articles, PCB foils and other documentation shown on each of the module pages were all originally copyright owned by various organisations (some, e.g.: Digisound Ltd, presumed no longer to be in existence). The scanned documents from Electronics Today International are used with the permission of Wimborne Publishing Ltd (note that they are unable to offer any support or assistance with any projects older than five years). In the event that anyone wishes to contact me regarding the information posted here, please e-mail me at dave@NO_SPAM_digisound80.co.uk (removing the obvious bits)..

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Page last updated : 29-Sep-04