MATRIXSYNTH

Vintage Roland SH-7 Analog synthesizer

Vintage Roland Micro Composer MC-4B

via this auction

This one need some work.
Pics of the inside below.

"The MC4-B is the second version of this model and contains expanded memory (48k)! Evidently the unit's timing is superior to MIDI. The MC4-B was state of the art when it came out and remains a unique tool today, thanks to its unique calculator style interface. Use this with your vintage Moog, ARP, Oberheim, Roland, Sequential Circuits and other vintage analog synths. It is a truly flexible piece of gear!

Here are a few other specs:

4 channels of:
CV1
CV2
gate
MPX

external CV and gate in
tempo CV in
external sync in and out (1/8")
calculator style keypad - enter your notes and step times with numbers!
cycle - loop function
din sync in / out - sync it to your TB-303, TR-606, CR-8000, TR-808, TR-707, MIDI to DIN converter, etc!
CMT tape sync in / out
copy, insert, delete, replace
cursor +/-
external control start / stop
and more..."

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Yamaha RX-7 Digital Rhythm Programmer Drum machine

via this auction
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YAMAHA QX-5 vintage sequencer

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Roland System 100m D-Set

via this auction
"Classic 5 modules
M-112 dual VCO, with 3 CV ins, 2 outs, and weak/strong sync
M-121 dual VCF, with an low-pass and high-pass filters
M-130 dual VCA, with a linear/exponential switch
M-140 dual Envelope (ADSR, invertable, and manual gate button) and LFO (5 waveforms with switchable range: x1, x1/10)
M-150 Ring Mod, Noise (pink and white), S&H (with lag), and LFO (5 waveforms with switchable range: x1, x1/10)"

Circuit Bent Talking Calculator Part 1 by freeform delusion

YouTube Uploaded by eecouk on May 27, 2010

via this auction
"The mods are:
Switched Mono mini Jack Output - Put this through your amp, PC/Laptop, mixer or Effects unit to further enhance the circuit bent sounds!

Green LED

Two Mini Switches - Both these produce a type of high squeeling noise. these do work best when the unit is slow right down.

Pitch Down Control - Takes the voices to an extremely slow speed creating grainey noise. this works well with the noise bends.

The unit does have some marks on it. Runs on 2 AA batteries"