MATRIXSYNTH

ROLAND SH-101 analog monophonic synthesizer

via this auction

Click the top pic to see where the modulation grip cable connects.

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Semi Modular Moog Prodigy

via this auction

"ONE OF A KIND!

SEMI MODULAR MOOG PRODIGY 336A ANALOG SYNTH
Most Moog Prodigys have no cv outputs in back
Some prodigys have 5 outputs in the back, Audio Out - Sync in - Osc in - Keyboard (CV) in
THIS prodigy has 10 ports in the back THESE ARE NOT AN AFTER MARKET MODS. THESE ARE FROM THE MOOG MUSIC FACTORY IN WALDEN NEW YORK.
THIS SYNTH WAS EITHER A PROTOTYPE, A CUSTOM ORDER, OR A VERY RARE LIMITED PRODUCTION UNIT WITH RARE OPTIONS.

THESE OPTIONS ARE:
The 5 common:
Audio Out - Sync in - Osc in - Keyboard (CV) in
BUT ALSO
S-TRIG IN - OUT (An early interface for moog keyboards and moog modular equipment such as sequencers etc.
Keyboard in (CV in) CONTROL THIS SYNTH WITH MIDI! SUCH AS AN ANALOG SEQUENCER OR A COMPUTER THAT HAS MIDI - CV CONVERSION!

AUDIO IN (PROCESSING EXTERNAL SOUND SOURCES WITH THE LEGENDARY MOOG FILTER!)
GATE IN (CONTROL THIS SYNTH WITH MIDI! SUCH AS AN ANALOG SEQUENCER OR A COMPUTER THAT HAS MIDI - CV CONVERSION!)
GATE OUT"

I seem to recall Howard Jones having one of these.

Update via ErrorAudio in the comments:

"There seems to be a lot of mystery and misinformation regarding these.
This was a mod that Moog developed and published through Norlin music Factory Service Bulletin NR:1312 in July 1981. The mod was also offered as a factory upgrade, that could be performed by retailers and the kit included all parts, stickers, and drilling template. It is unclear if the kits could be purchased by consumers, but given that the installation manual references Radio Shack soldering equipment, there is a chance that it was.

From the Norlin service bulletin: "This section provides updating information on the first 11,000 Prodigys produced and also presents various ways to modify the synthesizer for inter-facing. Instruments below serial number 4160 are very difficult to modify and require skillful and delicate use of a soldering iron as described below."

Interestingly there were two mod kits with two different parts lists. One for units with serial numbers below 8078 with 16 different part numbers (excluding wires), and one for units with serial numbers above 8078 (the units with standard cv interface installed) with only 7 parts part numbers (excluding wires). This suggests that there were 3 major revisions of the prodigy including the sub 4160 s/n units.

This might not be the full story but should hopefully shine a bit of light on these units."

Roland TB-303 with Kenton Mod and Black Bag

via this auction

Not the best pics, but you usually see TB-303s with the silver bag.

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Roland Juno-60

via this auction

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ROLAND Juno 106

via this auction

serial no. 491888

Roland RS 505

via this auction

"Roland RS 505 , the ultimate analogue string synthesizer. Separate bass , synth section and of course strings give you a much wider palette of sound from which to create some wonderfully thick and rich classic analog sounds and very big bass sound! Comes with the fantastic sounding roland ensemble effect (stereo output) . External input enables you to plug in any instrument and use this great effect."

Electronic Dream Plant (EDP) Wasp Synthesizer

via this auction

"Designed by Chris Hugget (the same man behind the Oxford Synthesizer Company OSCar), this is a fantastic sounding, quirky and unique synth. A little powerhouse with two oscillators and a filter that cuts like a razor blade. Only a handful of EDP Wasps were made, hence the obvious rarity."

Circuit Bent Rare Bontempi Memo Mickey

via this auction
"Circuit Bent Bontempi Memo Mickey Organ by freeform delusion

A rare and great looking Bontempi Organ. Big sounding bass machine with some nice mods for that something extra!

The mods are:
Mono mini jack output (speaker disabled)

Switchable Gating effect

Two Yellow Control Knobs - Pitch Bend and Gating effect speed

Two Red Control Knobs - Lofi Filter effects

Switchable Rainbow LED Effect with Blue volume Control Knob - a strange effect created by the Rainbow LED added, listen to the video from around 4:20, you will hear this effect being used. The blue knob controls the volume of this effect.

This unit take 4x C sized batteries

official website for .fd. - www.electroexistence.co.uk"

video posted here

Dr. Ts CZ RIDER

via this auction
"Voice Editing/Storage program
for Casio CZ series synths-C64 software

A voice editing and storage program for the Casio CZ series synthesizers created by Dr T using a Commodore 64 computer and a MIDI interface.

CZ RIDER is a voice editing and storage program for the Casio CZ Series Synths using a Commodore 64 computer and a MIDI interface.

Editing is fast and easy from either the synthesizer, the computer keyboard, or even a joystick. This program takes the mystery out of programming digital synthesizers and replaces it with fun! You can draw envelopes right on the screen while you listen to the sound change on the CZ synth. When you view all of the sound parameters in one logical display in easier to understand the complex interaction involved with synth programming. When you add CZ RIDER's ability to change any parameter instantly, building voices becomes quite simple. The changes are instantly sent to the synth so you can immediately hear your new sound.

CZ RIDER is also a tremendous voice storage tool. One 5" disk can store as many as 33 cartridges.

Dr T's Music Software was designed specifically for small computers in the 1980s and allowed individual composers and musicians to exert complete control over the creation of music with MIDI synthesizers.

There are other great features too. You can clone envelopes from one voice to another. You can build your own 16-Voice Sets. The convenient editing options make it a breeze to customize existing sounds or create sounds from scratch. Now you can play any sound you imagine. Its easy to program your own voices with CZ RIDER.

Included in the auction is the factory case, 5" floppy disk, and manual."