SDIY-ARCHIVE


This page contains downloadable files that I scanned from old articles I collected between 1975 and 1982. These articles are made available for personnal use and the copyrights belong to the journals in which they were published (Elektor, Wireless Word, Electronics, Electronic Design...). I used some of these for designing my own modular system back in 1980
Jump to Papers in french language

Electronics

TOPIC
OTA VCF (SVF)
TITLE
Voltage controlled integrator sets filter bandwith
AUTHOR
Henrique Sarmento Malvar
JOURNAL
Electronics, july 1980
DOWNLOAD
(PDF 1.0Mb) File
COMMENTS
  Multimode filter (state variable) based on OTAs, Voltage controlled resonance

TOPIC
ADSR envelope generator
TITLE
Adjustable exponential generator colors synthesizer's sound
AUTHOR
Randall Kirschman
JOURNAL
Electronics, july1980
DOWNLOAD
(PDF 416 kb) File
COMMENTS
 

TOPIC
ADSR envelope generator
TITLE
Two chip generator shapes sound
AUTHOR
Jonathan Jacky
JOURNAL
Electronics, september 1980
DOWNLOAD
(PDF 424 kb) File
COMMENTS
This design served as the basis for most of the ADSR modules found on the WEB (EFM kits, René Schmidtz schemo...).

 

Electronic Design

TOPIC
diode VCF (Sallen Key)
TITLE
Voltage tunable active filter features low, high and bandpass mode
AUTHOR
Nyle Steiner
JOURNAL
Electronic Design, december 1974
DOWNLOAD
(PDF 723 kb) File      the article re-edited by yusynth  
COMMENTS
A really great design with very few components. I built three of this type in 1979 and they still sound really great. Ken Stone proposes a nice PCB for it. Have a look at www.cgs.synth.net. Another interesting site for DIYing this filter is proposed by Motohiko Takeda.
 
TOPIC
linear VCO
TITLE
Inexpensive voltage-controlled oscillator is rich in harmonics over entire audio range
AUTHOR
Henrique Sarmento Malvar
JOURNAL
Electronic Design, April 1980
DOWNLOAD
(PDF 799kb) File
COMMENTS
WARNING : there is a typo in this schematic. Pins 1 and 5 are exchanged on the 555 timer in the schematic.
 
TOPIC
OTA VCF
TITLE
Use transconductance amplifier to make programmable active filters
The OTA offers a ten octave tuning range by using predictable Vbe-versus-Ic relashionships
AUTHOR
Sergio Franco
JOURNAL
Electronic Design, september 1976
DOWNLOAD
(PDF 1.9Mb) File      the article re-edited by yusynth 
COMMENTS
This is a great paper ! No CA3080,CA3082,LM13600 or LM13700. The OTA are made with LM3096/CA3096 !
I want to try this one using Intersil HFA3096 which is an improved version (good PNP pair) of the LM3096 (poor PNP pair). Anyway I have something like 20 CA3096 in my drawer and it worth the try...

TOPIC
ADSR envelope generator
TITLE
Get an ADSR waveform for a few components
AUTHOR
Orley Gabor
JOURNAL
Electronic Design,august  1980
DOWNLOAD (PDF 256 kb) File
COMMENTS
 


Wireless Word

TOPIC
Sallen & Key OTA VCF
TITLE
Voltage/current controlled filter
AUTHOR
Tim Orr
JOURNAL
Wireless Word november1976
DOWNLOAD
(PDF 466kb) File
COMMENTS
A now very classical design. Sallen key structure, two CA3080 OTA and a CA3096 expo converter. It shows some similarities with the younger MS20 lowpass filter.

TOPIC
Voice formant synthesizer
TITLE
The Chatterbox : A simple speech synthesizer for demonstration and amusement
AUTHOR
Ian Witten and Peter Madam
JOURNAL
Wireless Word december 1978
DOWNLOAD
(PDF 1.2Mb) File
COMMENTS
 

TOPIC
Fine tuning system
TITLE
Beat frequency indicator
AUTHOR
Craig Clapp
JOURNAL
Wireless Word november 1976
DOWNLOAD
(PDF 19kb) File
COMMENTS
This is not the original document, I redrew it and changed the ICs form old TTL to CMOS


SUBJECT  Digital infinite sample and world
TITLE  Digital sample and Hold (idea for design)
AUTHOR  N. MacDonald
JOURNAL
Wireless Word may 1976
DOWNLOAD (PDF 528kb) File
COMMENTS Based on few TTL logic ICs it can be easily converted to a CMOS version. A good starting point for designing a low cost quantizer !

 
SUBJECT  An early sound synthesizer project (a series of three articles)
TITLE  Electronic Sound Synthesizer
AUTHOR  T.Orr & D.W. Thomas
JOURNAL
Wireless Word may 1973
DOWNLOAD (PDF 528kb) File
COMMENTS A very basic but interesting design. Thanks a lot to Keith Snook for this very good scan

 

Elektor french edition

TOPIC
Vocoder
TITLE
Elektor Vocoder
AUTHOR
 
JOURNAL
Elektor 1980
DOWNLOAD
(PDF 7.2Mb!) File  French version only! for an english version go to Ander Sponton's page
COMMENTS
 

TOPIC
Digital keyboard scanner for analogue synths
TITLE
64 keys digital keyboard
AUTHOR
 C. Voss
JOURNAL
Elektor july/august 1981
DOWNLOAD
(PDF 2.7Mb) File  French version only!
COMMENTS
This a quite simple TTL based keyboard scanner for a 64 notes keyboard.
 
TOPIC
Digital keyboard scanner for analogue synths
TITLE
6 bit encoder for keyboard
AUTHOR
 L. Witkam
JOURNAL
Elektor july/august 1981
DOWNLOAD
(PDF 780kb) Fileiff  French version only!
COMMENTS
This a quite simple CMOS based keyboard scanner for a 64 notes keyboard.
  
TOPIC
Frequency shifter
TITLE
Elektor frequency doubler
AUTHOR
 
JOURNAL
Elektor february 1981
DOWNLOAD
(PDF 912kb) ipdfiff  French version only!
COMMENTS
This is a simplified implementation of the Bode frequency shifter. Only frequency doubling is achieved. This circuit uses a rather cheap SA602 frequency mixer.
  
TOPIC
Voice modifier
TITLE
Elektor voice scrambler
AUTHOR
 
JOURNAL
Elektor november 1981
DOWNLOAD
(PDF 1.9Mb) File  French version only!
COMMENTS
 
 
TOPIC
Voice modifier
TITLE
Elektor robotic voice
AUTHOR
 
JOURNAL
Elektor april 1980
DOWNLOAD
(PDF 1.1Mb) File  French version only!
COMMENTS
 

TOPIC
Balanced modulator
TITLE
Ring modulator and envelope follower
AUTHOR
 
JOURNAL
Elektor october 1979
DOWNLOAD
(PDF 2.1Mb) File  French version only!
COMMENTS
 A classic and efficient circuit based on the MC1496.

TOPIC  Waveshapers 
TITLE  Générateur d'effets sonores    Générateur d'harmoniques commandé en tension
AUTHOR  anonymous , Bertuch
JOURNAL
Elektor july-august 1980
DOWNLOAD  (PDF 904kb) Fileff  French version only!
COMMENTS  Simple but efficient waveshapers

TOPIC     Make your single VCO sound like 6 !
TITLE    Dent de scie déphasée
AUTHOR   Directly inspired from a paper by Bernie Hutchins (JAES 1981)
JOURNAL
Elektor november 1982
DOWNLOAD  (PDF 860kb) File  French version only!
COMMENTS   A classical design found in the DigiSound 80 modular

TOPIC    A sample & hold for the FORMANT
TITLE    Echantillonneur bloqueur pour synthétiseur
AUTHOR   J. Binder
JOURNAL
Elektor july-august 1980
DOWNLOAD  (PDF 412kb) File  French version only!
COMMENTS   A very classical design

TOPIC    Percussion electronique
TITLE    Percutron
AUTHOR   anonymous
JOURNAL
Elektor november 1982
DOWNLOAD  (PDF 720kb) File  French version only!
COMMENTS   

TOPIC    DISCO percussion
TITLE    Percussion DISCO
AUTHOR   anonymous
JOURNAL
Elektor june 1984
DOWNLOAD  (PDF 400kb) File  French version only!
COMMENTS   Piooouuuu pioooouuu......

TOPIC   Quantificateur pour synthétiseur
TITRE
Quantificateur
AUTHOR    anonymous
JOURNAL  Elektor octobre 1983
DOWNLOAD   (PDF 736kb) File  French version only!
COMMENTS    Les principes d'un quantificateur du type ADC-ROM-DAC

TOPIC   Module de phasing 12 étages
TITLE   Déphaseur audio
AUTHOR    
JOURNAL  Elektor décembre 1983
DOWNLOAD   (PDF 820kb) File  French version only!
COMMENTS    Un module de phasing à douze étages et à capacités commutés. Possibilité de commande en tension.
 
TOPIC   FORMANT le synthétiseur  modulaire
TITLE   Formant synthétiseur (livre 1), Formant : les extensions (livre 2)
AUTHOR    C. Chapman (book 1), J.P. Aigner (book 2)
EDITOR
Elektor 1979, 1980
DOWNLOAD   Le Formant, livres 1 & 2    French version only!
COMMENTS    Un ouvrage très complet qui mériterait une réédition ! A lire absolument !

 
TOPIC   a small synthesizers :  Le Chorosynth
TITLE   Le chorosynth
AUTHOR    J. D. Mitchell
EDITOR
Elektor avril 1980
DOWNLOAD    PDF File  French version only!
COMMENTS    An interesting and inspiring project!

TOPIC   Alimentation pour synthétiseur
TITLE  
AUTHOR  
EDITOR
Elektor 1983
DOWNLOAD   FileFrench version only!
COMMENTS    Un ouvrage très complet qui mériterait une réédition ! A lire absolument !

SUJET
The Elektor's polyphonic synth project
TITLE Le polysynth NEW
AUTHOR  
EDITOR Elektor 1982
DOWNLOAD The article series French version only!
COMMENTS ATTENTION, le VCO, le VCF et les ADSR sont basés sur l'utilisation de circuits spécialisés CURTIS (CEM3340,CEM3320 et CEM3310) qui sont aujourd'hui très difficile à trouver et très coûteux !


Radio Plans

TOPIC
Introductory paper on electronic music synthesizers based on Moog's schematics
TITLE
Electronic Music: synthesizers for composers
AUTHOR
 F. Juster
JOURNAL
Radio Plans 1973
DOWNLOAD
(PDF 1.7Mb) File  French version only!
COMMENTS
 A big thank to Cyril Hoffmeyer for providing me with the scans of this paper
  

Others...

TOPIC
Student project supervised by T. Rochebois : building a small analogue synth
TITLE
Synthesizer schematics
AUTHOR
 Thierry Rochebois
JOURNAL

DOWNLOAD
(PDF 184kb) ipdfiff  French version only!
COMMENTS
This is a PDF file containing the schemos of : thermo-controlled (oven) VCO, VCA, ADSR and keyboard controller.  This is a salvage of  the schemos that used to be available  years ago at Thierry Rochebois'  homepage. This ressource  has disappeared for long now, therefore I thought it was a good idea to make this available again to SDIYers. Thierry kindly agreed on that.