MATRIXSYNTH

Plankdronium

YouTube via salzmanufaktur
"A day and a night in the Electroplankton universe.
The Plankton named 'Sun Animalcule' grows when you hit the touchscreen. And when the sun goes down in plankton land, the pianoish singleshots turns into pads."

Serge modular wilson delay

YouTube via cray56

Update: A little more info on the Wilson Delay in this video via Bakis Sirros on AH:

"a new Serge M-odule has been released! it is the Wilson Delay M-odule and it costs 2250 USD.

it includes:
the Wilson Analogue Delay module, a Dual Transient Generator, a MIX PRO,
and an XFader. photos are in the photos section (m-class album) of the Yahoo Serge
group."

Sequential Circuits Pro One Synthesizer Green!!

via this auction

"Sequential Circuits Pro One analog mono synthesizer serial # 8479... a wonderful green color. Although I doubt it's a factory paint job, it's very nicely done and looks like it's been this way for a long time."

NEXT! Spacebass 3.3

images via this auction
"VCO w/ Tuning and sweep between square and triangle wave (both are PHAT)
VCF w/ Cutoff, Resonance, and Env/Mod (sounds just like the real thing)
VCA/VCF Accent
Envelope Decay
Master Volume
On the back: 1/4"output, VCF IN, MIDI IN, adapter in (12vAC), and midi 4 mini toggle switches."

EML Poly-box Vintage synthesizer

images via this auction

"EML poly-box synth from Electronic Music Laboratories in Vernon, CT"

ARP 2600

images via this auction

Oberheim Four Voice

images via this auction

Sequential Circuits Prophet-10

images via this auction

"Sequential Circuits vintage 10 voice synth. Like two Prophet 5's but can play all 10 voices from one keyboard or split between the two."

Serge Panel Buchla 281

via eletro-music.com
Link to the project info: link
"the title, i guess, says it- this would be the first PCB i have offered, and as is always requested, any suggestions/questions are welcome. i will post up some scope-shots as they will help to illustrate the "quadrature" and "OR's" functions at work.

the PCBs will be silk-screened and solder masked and a .pdf with all pertinent info will be included. i have tried to make the design as versatile as possible- one generator per board that can be used alone or in conjunction with others-
there are pads for PCB-mount potentiometers, with the Pot bodies spaced
1" center-to-center.

i have modified a few things- but the circuit is very close to the original. the controls, ins and outs are:

attack control with CV input
decay control with CV input
gate/trig input
end-of-cycle pulse output
CV output (0-10V)
3-way mode switch (AR transient, ASR or cycle)
quadrature mode
OR or peak output with attenuator and provision for external input
LED indicator"
More info here.