MATRIXSYNTH

quotile-sequencer

YouTube via clone45a6
"My new, free MIDI sequencer pumped through a Machinedrum. Check it out over at http://www.quotile-sequencer.com
The command line is cut off at the bottom, so there's a little bit of lag between before you see the commands that have affected the sequencer."

Yamaha DX11 Times Three

via this auction

Circuit bent Hing Hon EK-001 squarewave synth

Part 1: Circuit bent Hing Hon EK-001 B&G LED version, 11 mods + opto theremin [full overview]

YouTube via frostedminipete. via this auction
"Probably the most amazing thing I've ever put together. I really like this thing.

Modulation knobs
Pitch down knob
Modulation/Distortion opto-theremin [with on/off]
Low pass filter switch
Blippy switch
Fuzzy switch
Crazy glitch switch
Acts as a distortion/modulation box [through the mic input]
1/4" Audio output jack
Ultra bright sound pulsing blue and green LEDs lining the front of the keyboard

**I will take commission to build one for you! Send me a message through youtube**"

Part 2: Circuit bent Hing Hon EK-001 B&G LED version, 11 mods [Opto theremin demo]

images via this auction

Yamaha CS80 Combo Organ

via this auction

Note the seller has a ton of other vintage manuals up for auction. Be sure to click on next at the bottom of the page when you get there for more. The CS-5 and others were on the last page. Note these are listed as originals, the scans label below is just to stick them in the bucket with all other posts featuring scans, manuals, docs, etc...

Paia 4700 Modular Synth and Gnome

via this auction

"Here are the list of the included modules:
4710 Balanced Modulator
4712 Reverb and Tank
4720 VCO
4730 VCF
4740 Envelope Generator
(2) 4762 Wing Modules
(4) 4770 Power Block Modules
4780 12 Stage Sequencer
8780 Equally Tempered D/A Convertor
8782 Keyboard
Control Oscillator Module
2) Handmade Mystery Modules that I have no idea what they do
Other Info can be found here"

VINTAGE UNIVOX MODEL J6 VALVE AMP Keyboard

via this auction

Moog Memorymoog

via this auction
"On the surface the Memorymoog is laid out similarly to the Minimoog. Except it is like having six Minimoogs in one unit! Three oscillators with saw, triangle, and square waveforms with variable tuning and range for each. The mixer section provides level controls for each oscillator and the noise source. The filter is the standard issue Moog 24db/oct ladder filter with variable cutoff and resonance. Note that the filter IS self-resonant. A dedicated ADSR is assigned to the filter with variable depth, and a myriad of modulation sources are available from osc 3, the LFO section, and the external inputs. The VCA section also has a dedicated ADSR, and can also be modulated by several other internal and external sources. And finally comes the master VCA with programmable level (a handy feature) and better yet, a headphone jack with level control! Having a dedicated LFO section is a great addition to the osc 3 mod functions available in the original Minimoog. As mentioned earlier, there are several assignable external CV inputs, along with a nifty arpegiattor."

Thomas Henry VCO-1

This one is not new, but I don't believe I've posted it in the past. It recently came up on the SDIY email list as a simple affordable DIY VCO.

"The VCO-1: An Uncomplicated VCO That Truly Delivers
Designed By Thomas Henry

Preface: Towards the end of May, 2007 I began to grow excited over the possibilities the summer of 2007 might hold. Through fall, winter and spring, Thomas Henry pursues his career of teaching mathematics in Mankato, Minnesota, but during the brief respite he has from that over summer, he always manages to unleash some new design that has been tickling his imagination throughout the school year. In the summer of 2006, Thomas developed the XR VCO, the SN-Voice, the UD-1 Drum Voice, then nonchanlantly capped off the season with a design *for an entire synthesizer* that contained two different VCOs, a phase shifter, a VCA, a multi-mode filter, a very unique LFO (which would occupy many pages ot text just to describe all of its uses), a sample and hold, a power supply, and a digital noise circuit, the specifications of which are quite astounding. This collection of schematics turned into the publication "An Analog Synthesizer for the 21st Century" which will be available from Magic Smoke Electronics towards the end of Summer 2007.

So, I was not terribly surprised (but very pleased) when Thomas contacted me about a design he wished to make freely available to the public. He sent me the schematic, and I was amazed to see what appeared to be a very simple little VCO circuit..."

KORG FAMILY!!

flickr by industrial drawing
(click for more)

full size

Spot the gear

The Blue and Yellow is an ULT sound [Ultimate sound] DS-1. Click on the Ultimate Sound label below for prior posts with more info.