MATRIXSYNTH

Roland Jupiter-4 with Io Midi

via this auction

"Roland Jupiter 4 four voice analog synthesizer. Professionally installed Io midi kit, a very powerful midi kit that lets you transmit and receive all sliders and switches via midi, along with 32 program patch memory storage."

You can find full details on the Io kit on roland-jupiter.org here.

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Moog Source Vintage Analog Synth

via this auction

Yamaha CS-80

via this auction

"The CS I've owned since the early 90s. Used it sparingly until around 2006 when I got back into the sound of it. Massive service by Kent around then, its featured on an album I did. "The Meeting" by Hudson Fall. All the synths are the CS80 [1st video below]. you can see it and [2nd video below] you can hear it (its not the organ thing i'm pretending to play)!!"

HUDSON FALL - (I CAN'T) DREAM FOR YOU MUSIC VIDEO
YouTube via rkruger — December 31, 2007 — "BRAND NEW MUSIC VIDEO FOR HUDSON FALL'S "(I CAN'T) DREAM FOR YOU", DIRECTED BY RYAN KRUGER
MYSPACE.COM/ENIGMAACE
EDITED BY MICHAEL S. DAVIES & RYAN KRUGER"

HUDSON FALL - A REASON TO BELIEVE

"rkruger — February 09, 2008 — MUSIC VIDEO FOR MERSEYSIDE BAND HUDSON FALL'S TRACK "A REASON TO BELIEVE"
DIRECTED BY RYAN KRUGER
EDITED BY MICHAEL S. DAVIES
MYSPACE.COM/ENIGMAACE"

Gristiesm-1

flickr by Matt The Modulator
(click for more including mouse overs)

"A circuit bent Gristleism ive put the volume and pitch pot (with extended range) on to the front for easier control and a LDR to control the pitch with light. The speaker and puch button are also on the front (taken from a furby) this makes more room inside for the pots etc how to circuit bend the gristeism can be found hear
www.magicmess.co.uk/cb/gristleism.php"

Retronyms iPad Synth: Patch Editor

YouTube via retronyms — June 01, 2010 — "A brief look at the patch editor upgrade for iPad Synth. http://retronyms.com/synth"

Retronyms on iTunes
iPads on Ebay

mental metal

YouTube via scaffbeat — June 01, 2010 —
"Tags: Malekko Noisering modular"

ANimALOGICA 2 Bologna Synth Meeting - Synthesizers.com

YouTube via NoctivagaMusica — June 01, 2010 — "ANimALOGICA 2 Bologna Synth Meeting Meeting on Synthesizers.com 1.11.2010"

PPG "Der Kleine" - The First PPG

via Jan. The following audio is of Wolfgang Palm's first PPG called "der Kleine." According to Jan, only 5 were produced. A former owner of "Der Kleine" was Amon Dul II.

Jan: "'Der kleine' was built prior to the 1002/1020 ( those circuits are based on the 'Kleine') I am currently discussing with W.Palm on how to fix all the sites to include this synthesizer."

Update via ahiv93 in the comments:
"Here's a link to a pic via sequencer.de http://www.sequencer.de/blog/?p=2256"