MATRIXSYNTH

1961 Electronics World - Transistor Theremin by Bog Moog

"1961 Electronics Magazine
Build a Transistorized Theremin
Increasingly hard to find, this nearly half-century-old issue of Electronics World contains a fascinating how-to on building that special effects staple of scores of classic sci-fi flicks, the theremin, by none other than electronic music pioneer Robert Moog. The feature article contains a complete schematic and parts list, as well as chassis layout and photos of the completed unit. There are even tips on how to play the ethereal instrument. You get the entire original 1961 magazine, not a couple photocopied pages like you find elsewhere on Ebay.

Also in this issue is a homebrew stereo balancer using 6FG6 magic eye tubes and a look at beam power tubes in VHF oscillators, plus an article on early computer logic circuits, both vacuum tube and transistor-based."

Roland SH-1000

images via this auction

Oberheim OB-Xa

images via this auction. Includes one of the inside.

Roland MC-202 Mod / Circuit Bended

images via this auction
"Roland MC-202 synth Mod/ Circuit Bended Version. I've put the same Super long sweep function on the LFO just like the sh-101 mod. You can easily sweep the LFO over 40 seconds easily. Best for trance music. I've also added 10 jack sockets, so there is many more things you can do : Proper CV Gate Input / VCF Cut Off CV / PW /VCA (volume limit control) / MOD / Portamento CV Switch Input / Accent CV Switch Input / Selector for accent (VCF/VCA) / Ext Aud input for VCF / Ext Aud input for VCA. Well, there is plenty more I can add to the MC-202, but there is really not much space in the MC-202 box, I've almost use every single inch of space in there. I could of use a wooden case just like my TR-606 mod, but I couldn't be bother to spend so much time just to make a wooden box.

Mods on the MC-202:
1./ LFO switch : You can choose from Super Slow Sweep / Normal / Crazy Fast
2./ Proper CV gate Input : The MC-202 does have CV/Gate In's and out's. However, it's a known problem that the CV/Gate Inputs have slight problems, since many data are actually quantised before they reach the Synth section. This is because the CV/Gate In's are routed and pass through the internal sequencer CPU then out back to the synth.
3.) VCF Cutoff cv (input) : When a jack is plugged in, the CV is ADDED to the VCF Cutoff Frequency slider setting.
4./ PW CV : When a jack is plugged in, the CV is ADDED to the PWM Slider setting
5./ VCA (limited Volume Control) : The VCA CV In doesn't produce any dramatic effects, it acts like an extra Volume Control.
6./ MOD : Actual MOD on the MC-202 goes from the LFO Sine output to the MOD Slider. So it is possible to tap a CV IN to the mod...
7./ PORTAMENTO CV SWITCH INPUT ( +5V will turn Portamento OFF. 0V will turn it ON. ) : Note: +5V will turn Portamento OFF. 0V will turn it ON.
8./ ACCENT (VCA) CV SWITCH INPUT ( +5V will turn ACCENT ON. 0V will turn it OFF. ): +5V will turn ACCENT ON. 0V will turn it OFF.
9./ ACCENT (VCF) CV SWITCH INPUT: +5V will turn ACCENT ON. 0V will turn it OFF
10./ Selector for Accent -> VCF/VCA (toggle switch): MIDI AUX GATE Out to switch between going to the VCA ACCENT and the VCF ACCENT. When switched, AUX GATE is going to BOTH Accent VCA and Accent VCF, and this actually activates the Accent VCF.
11./ Ext Audio Input to VCF Source Mixer: all the VCO's and Sub-Osc are mixed at the VCF Source Mixer
12./ Ext Audio Input to VCA"

Yamaha DX7 IIFD

images via this auction

"Specifications:
* Polyphony - 16 voices
* Oscillators - Programmable 6-operator x 2 (A & B) 32-algorithm digital FM tone generator
* LFO - Sine/Square/Tri/SAW up/SAW Down/Random
* Filter - None
* VCA - 6 Envelope generators 8 parameters each
* Keyboard - 61 keys, Velocity and Aftertouch, Split and Layer mode
* Memory - 128 patches, 32 performances
* Control - MIDI IN/OUT/THRU
* Date Produced - 1987"

New Sequencer Project PCBs

via this thread on electro-music.com. These are the PCBs for the Roland 185 sequencer clone featured in this video. If you haven't seen it, do check it out.

Citric Acid´s new studio

YouTube via acidjack303. "My new Studio."

Citric Acid´s Studio Pt.2

MFB-KRAFTZWERG

"* semi-modular, fully-analog
* 3 VCOs, 24-dB-lowpass-filter
* 37 patch connectors
* integrated MIDI/CV-interface
* MSRP: 580,- Euro

MFB-KRAFTZWERG is the semi-modular version of MFB’s Synth-II. It trades memory locations and MIDI-control off for 37 patch connectors that allow breaking and modifying the internal routing. Put single KRAFTZWERG components under analog sequencer control or let the whole unit interact with your existing modular-synthesizer-system.

MFB-KRAFTZWERG works as a stand-alone synthesizer without the need to patch any cable. The classic formation of VCO-VCF-VCA is pre-wired internally, complete with essential modulations. Therefore, you can play the KRAFTZWERG just like any other synthesizer using its MIDI-input. In addition, it may integrate into a full analog environment using control voltages – and benefit, unlike MIDI, from infinite continuous parameter resolution.

MFB-KRAFTZWERG offers a complete set for powerful and versatile synthesis: three VCOs with hard-sync, 24-dB-lowpass-filter with resonance, noise generator, ring-modulator, two envelope-generators, two LFOs and VCA. Technically and soundwise KRAFTZWERG is identical to MFB’s euro-rack-modules. However, the MFB-KRAFTZWERG comes in a compact format that is easy to take with you and faster in use. Your ideal analog partner on stage!

MFB products are sold at your musical instruments dealer. If you can´t find any reseller closeby we will also sell the MFB-KRAFTZWERG directly within Germany. The price is 580 Euro (incl. VAT plus 10 Euro shipping, cash on delivery)."

MFB-KRAFTWERG See this thread on electro-music.com for some notes on the MFB-KRAFTZWERG and 503 by ar2jr.

AtmoSphere SFX on MS20

YouTube via Synthnl.
"A little video we made during the creation of some wind sound effects we made on the Korg MS20 for my AtmoSphere album." See this post on Synth.nl for additional notes.