https://youtu.be/Glu9wA4HjE0

logo and wheel panel ,just a marker and easy

testing a dual crossfader http://synthacks.blogspot.mk/2015/12/xfade-dual-crossfader-based-on-buchla.html  audio inputs work fine with additional 56K resistors ,vactrols 

the first synth i ever bought was old Vermona ,it was working well until it could not be triggered anymore from the keys ,then it went where all broken gear goes ,i wrote to folks at Vermona to get the schematics and fix it ,i got the schematics and it remained in the basenent for years , as the keys are gone it leaves a lot of panel space ,i located the trigger and cv input , the odd vcos react interesting to audio range input ,more .. the " fine" input can be used for just that ,the " briliance" or " real frq " of the vcf would be nice with additional cv's ,first idea for the free space and in order to keep the instrument's caracter is to make a MFOS 32 step seq as it will exactly fit the space too ,here are few images of the Vermona

" She adjusted the controls of a musical instrument that played soft and complicated strains out of it's own creative bowels by striking notes and chords in a random manner ; the randomness weighted in favor of pleasant combinations by intricate mathematical formulae. The music could no more repeat itself then could snowflakes ,and could no more fail of beauty ."

Asimov Isaak - The End of Eternity (1955)

"A vague blur of music had started up at one end of the chamber .A music robot ,creating random combinations of sound ,harmonic colors and shades that flitted agilely ,too subtle to pin down .Some couples started dancing listlessly. " 
Solar Lottery ( World of Chance) 1955
Philip K Dick

birds were singing in the back while recording this ,not captured sadly

and snow..

universal pcboard with attenuators ,noise generastor and envelope followerr

Tri interesting circuits for hi-fi or post-production ,or simply experimentation with synthesized sounds ,circuits are from Bulgarian magazin : Radio ,Televizija  Elektronika 1975 ,i read somewhere one can use NTE 909 as equivalent


 presence filter ,tone controls and 4 band eq

Digital Quantisizer  from Elektor Magazine October 1983

 

 

 

too much fm in the buchla oscillator one ,changed the attenuator from 50K to 200K for more reasonable detune ,on soundcloud : https://soundcloud.com/r25990127/sound-71

drndorec.

earlier builds

a little gallery of the synths i've built

This is a Groove Box i just completed ,and intend to keep it at least for a few years i hope , I built it with lesson learned from my previous Groove Box , i added a CGS Gate Seq and Yusynth Pulse Delay in addition to the Buchla 208 Uncorrelated Random ,and now it's all Hagiwo Sampler Drums , exactly 4 voices .Now in my set up i have 240 Samples carefully selected ,it was work to select and convert cut and trim all 240 sounds to 48Khz 600mS ,also to clean the baked paint of the enclosure ,

This is a DIY Mixer , it is based on Buchla and Serge simple mixer circuits ,in addition in it there are 3 x SIAM Eqalizers and a 4 channel filter bank. This one went to Montenegro.

 

This is a 4U format ,Serge-a-like single panel modular ,i think this was something i spent most time on ,it is specific as it had only Yamaha GX BPF and Low Pass Gate ,2 x 258 Buchla VCO's ,Serge Wavemultipliers ,Serge SSG and Hagiwo's Bezier Random ,also Buchla 106  and Buchla 194 BPF and few other things .The enclosure was packed with shitload of PCB's .The PSU was external .This one went to Croatia .

This is a single panel synth i used for a longer period . It was built out of modules i had leftover from my big Serge-a-like with 5 panels I sold it unfinished  ,few pcb's just wait to be populated . This is mostly Electronotes - Synthesizer ,VCO ,VCA ,VCF is Electronotes ,the rest is a pair of 111 Buchla ,NLC Spasm ,Buchla Quantized Random ,LPG and so on . This one is built inside an old tube radio enclosure and i love how it turned out ,but i just couldn't get myself to complete it . It went to Montenegro .

 

 

This is Best of CGS that i built for a friend in Netherlands ,he had the complete kit so i just put it all together , it was really fun as i never built anything with a kit earlier ,this is really a breeze ,if you can buy the kit buy it .t

 

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This is a 4U Serge-a-like panel i built for a friend in Japan .This was a first time i built anything into a Hammond enclosure so it was a battle for me .Anyway in the end it turned out all right i guess .This one has a 4 Step Programmer/Seq by Serge ,2 x Serge VCO's ,Serge 73 VCF ,DUSG and so on ..

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This one went to UK ,and it was built many years ago actually .Into an enclosure from Industrial Equipment ,it was really heavy ,I recorded some interesting patches using just this ,based mostly on Serge VCS ,NLC Difference rectifier ,NLC CHaos ,CGS Grinder and so on.

This one i built for friend locally ,and i really built it as if i was making it for myself ,it had really interesting selection of modules like a Wogglebug ,Buchla VCO ,Serge Negative Slew ,Oberheim VCF ,even a PAiA BPF .

This is my very first synthesizer ,it was really a wreck and you had to hold parts of it when you played ,it had lot of cardboard and whatever i could find for panels ,i had lot of fun with it ,and even recorded something i still like the most .
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These two are built for a friend locally . The first one had an Arp Filter ,2 x 258 VCO's ,a Thru Zero VCO and so on . The white one is same dimensions meant to be used as expander for the first one and built few years later ,contained mostly Serge circuits ,Positive and Negative slew ,Serge VCF ,Serge Comparator ,Serge VCADSR and so on..
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This one....

This is a Eurorack module i built for someone in Denmark , it is 2 x Buchla 258 VCO's with a Serge Wavemultiplier and CV Twister from Grant RIchter on one panel 

This is a big Serge-esque Modular i built around 2018/2019 ,it had a full small Serge Sistem in it and more then few modules i never used ,i sold the Serge Voice ,and few modules i repurposed for my Tube Radio Modular ,still there are some 10 other modules that just leftovers in some drawer . 

This is a Mixer i built to make feedback loops , it is actually one Buchla 106 Mixer and 4 Serge Mixers with additional features like compressors ,limiters/saturators and a joystick panner ,additionally there are 3 SIAM Siemens inspired Equalizers 

This is a Groovebox i built with Experimental Hardware Neurons from Wiard as trigger Sequencer , voices include 2 x Hagiwo Samplers ,Hip Bass Drum and 2 x NLC Bong0's ,additionally there is 194 Buchla ,208 URV Buchla ,106 Buchla ,99DSP Effects ,Colorupter ,4052 Pattern Generator  .This one is sold too .

this panel is next ,the case is Modcan style ,using banana jacks as my earlier panel ,ring mods and quantized random are ready ,panel printed ,psu ready and good mood, modules yet to be inside for more then noise :
    Quadrature Zero VCO
    Yamaha GX VCF ( or Korg MS20 VCF)
    Buchla 291 VCF (single )
    Buchla 111 Ring Mod. (Dual to use for Freq Shifting)
    Dome Filter
    Crossfader Dual
    Extended ADSR Serge ( Dual )
    Fixed Filter Bank ( 18 Bands )
    Master Clock Divider CGS
    Buchla SOU (only Quantized Random section )
    Attenuverters x 3
    Analog Switch Matrix - Roland System 700
    Hip Bass Drum - C. Anderton

Snare Drum Roland 808

Rimshot Roland 606
Electro-Harmonix Sonic Boom
Envelope Follower/Preamp Buchla Music Easel
Noise Gate J.Haible
Experimental Hardware Neurons x 4 - Wiard