MATRIXSYNTH: Monday, April 23, 2012


Monday, April 23, 2012

OLSEN Rockmate Keio Korg 1966 Vintage Analog Drum Machine Video


YouTube Published on Apr 23, 2012 by abertronic
This one is currently listed here. Pics captured earlier here.
via abertronix on eBay (RSS)
"Rebadged Keio Donca Matic Rock Mate, Keio being the name of the company before it became korg. This was made in the mid to late 1960's and is possibly the first portable drum machine manufactured.
It is a preset drum machine which runs off either a 9v battery or 9v ac adapter. It has 6 basic rhythms A- F and an interesting "solo" button. This solo button seems to have 3 functions but actually the way it works is (as it is a momentary type of switch) when you hold it down you get repeating 32nd notes - but if you manually press momentarily you can get 16th or quarter notes.
In any case this solo function enables you to vary the limited presets by a fair amount by introducing the ability to add your own poly-rhythms. Its a wonder why this function didnt appear much on later units as it transforms a rather boring preset drum machine into something much more useful.
Please check out this and other vintage japanese gear on my ebay store."

Update via abertronix in the comments: "If I have time before it sells I'll try and draw up a diagram. Great little circuit and all values are actually written on the board. Interesting to note the designers name "T.OSANAI" credited on the board. Tadashi Osanai was one of the founders of what went on to be known as Korg."

Polyoptics: sophisticatedfinishes - Teenage Engineering Op-1


YouTube Published on Apr 23, 2012 by Axiomatick

"make'n models and paint'n beats."

Polyoptics: earbrain - Teenage Engineering Op-1, Elektron Octatrack.

YouTube Published on Apr 23, 2012 by Axiomatick

"Messing up loops from the op1 in the OT. Probably going a little bit overboard on the OT."

Sequential Circuits SCI Six-Trak SN 002396

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via this auction

Oberheim OB-1 Vintage Analog Synthesizer

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via this auction

Quasimidi Sirius SN 51178

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via this auction


Boss DR-55

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via this auction
Perfect Circuit Audio (RSS)

Studio Electronics Code 4 Voice SN P 1356

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via this auction
Perfect Circuit Audio (RSS)

Studio Electronics SE-1X SN C 3390

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via this auction
See Perfect Circuit Audio (RSS) for one more.

Emu E4X Turbo (David Rossum Silver Edition) SN 039700002

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via this auction
Perfect Circuit Audio (RSS)

"Emu E4X Turbo (David Rossum Silver Edition with 1.2GB HD, 128MB RAM and 128 CH option installed)"

Baldwin Discoverer DS-50 SN BC2803935

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via this auction
Perfect Circuit Audio (RSS)

Korg Z1 SN 001062

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via this auction
Perfect Circuit Audio (RSS)

"Korg Z-1 Multi Oscillator Synthesizer"

Marion MSR-2

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via this auction

Akai MPC-60 II sampler sequencer (OS 2.12)

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via this auction
Perfect Circuit Audio (RSS)

Waldorf Q Yellow Keyboard Synthesizer

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via this auction

ARP AXXE 2313 SN 23130680 With Original Orange Anvil Case

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via this auction

Human Resistance Synthesizer


YouTube Published on Apr 23, 2012 by mike19822058

"http://www.handmadeelectronicinstruments.com/

This is a lo-fi synthesizer that is played by bridging a connection between the two large contact handles. The pitch is controlled by the amount of resistance. The more resistance or lighter touch produces lower frequencies. This oscillator is then modulated by a LFO, giving this device very nice throaty, almost vocal sounds. It can also be played through multiple people creating a human chain.

The three large knobs control the speed of the LFO, a low-pass filter, and volume. It is powered by an included 9volt battery. A green LED indicator flashes in sync with the modulation. A standard 1/4" output makes it perfect to connect to amps, effects, or recording equipment.

This is the second of a matched pair of these I built using repurposed cigar boxes, salvaged handles, and new as well as salvaged components."

drone patch for stand alone synth.


YouTube Published on Apr 23, 2012 by textualmusic

"this is a pretty simple patch that I am working into a stand alone drone synth. Right now its basically 2 voices. 2 40106 oscillators high speed driving 2 dividers, the /2, /4, /8 outs are the LP, BP, HP inputs on a simple filter, of which cutoff is controlled by a vactrol from a variable triangle LFO."

Nanoloop on Iphone


YouTube Published on Apr 23, 2012 by my4trackmachine

"a short little song i wrote while doing some musical exercises. made in 10 min."

nanoloop - Oliver Wittchow
iPads on eBay

Quad 8 Analog Sequencer Q32MXT8A 32 Channels Total


YouTube Published on Apr 23, 2012 by pieruixmaster

"The Q32MXT8A is a Quad 8 Analog Sequencer, 32 channels total. There's 4 Banks with complete full control. Control Voltage outputs, Trigger outpus and External Clock inputs. Description below:

Access Virus TI2 Polar Limited Edition

Note: Auction links are affiliate links for which the site may be compensated. via this auction

"If you are viewing this auction you should already be familiar with the pedigree of the Virus sound and know that it is what you want. If you don't, I suggest you do some research as this is is a big-ticket item and not meant for impulse buys. If you compare this to other auctions, keep in mind this is a TI2 model, which equates to more DSP power and polyphony when compared to an original TI model. It is also of course a limited edition model..."

Coron DS8 Analog Drum Synth Video

Note: Auction links are affiliate links for which the site may be compensated. Coron DS-8 for sell

YouTube Published on Apr 11, 2012 by RuprechtM

via this auction

"All sounds in video are from DS8.
Analog drum synth with some extras Coron DS8 clone for sell.
3-color noise, hold button for continuous sound, LFO speed LED. Built by me.
Anodized aluminium housing, wooden sides. Built like a tank :)
Powered by DC wall adaptor 9-15V (ordinary 2,1mm center positive - not included. I can include one for Germany and other countries with similar wall outlet).
Feel free ask me for anything at nedele()seznam.cz
I can ship worldwide."

CAT synthesizer by Octave

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via this auction

"Control Zone" by Mark Mosher (Live Rehearsal Video)

"Control Zone" by Mark Mosher (Live Rehearsal Video) from Mark Mosher on Vimeo.


"One Man, One Theremin, One AudioCube :^) In this video I perform the instrumental electronic music song "Control Zone" off of my album I HEAR YOUR SIGNALS which you can download from markmosher.bandcamp.com/album/i-hear-your-signals.

I'm routing the Moog Etherwave Theremin analog signal into Ableton Live and convert the pitch-to-MIDI in real-time then route the signal to various virtual instruments hosted out of Live. I then use a Percussa AudioCube in Sensor mode to add 4 additional dimensions of modulate in real-time. So 6 dimensions of spatial control. I'm changing the signal routing of the Theremin to route MIDI to different virtual instruments on the fly using the Novation Launchpad. I definitely went for "Hendrix" in parts of the song.

MarkMosherMusic.com"

Dem Jamz 2: Mono/Poly Madness! by Alex Juno


YouTube Published on Apr 22, 2012 by elmosexwhistle

"The Korg Mono/Poly debuted in 1981 and is a powerful and classic mono-synth. With a great self-oscillating Korg 24dB filter, 4 versatile VCO's and nice envelopes it creates that classic Korg sound. With a number of other little tricks up it's sleeve, including a Paraphonic mode, Arpeggiator, Sync, Cross-mod, LFO rate abuse and the like, it's timbral range can be pushed even further!

In this video i've put together a number of tracks using only the Mono/Poly, a CV interface, some drum samples, and the odd subtle plugin effect. There's everything from dirty dirty Techno basses & cutting hoover sounds, to funky retro leads and synth brass, to pure insanity care of Mr LFO and Mr Xmod.

Track Listing:

1. New Musical Revolution (Mono/Poly Mix) - Alex Juno
2. Dirty MP Beatz - Alex Juno
3. I Am Rubber, You are a Glue Sniffer - Alex Juno
4. Spacefunker - Alex Juno

So come and sit around while i spit my tripe, i got more flow than a cistern pipe!

PS Sorry i didn't use the arpeggiator on the machine, i'll get around to it soon :)"

Circuit Bent Homedics Sound Spa by freeform delusion

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YouTube Published on Apr 23, 2012 by eecouk
freeform-delusion on eBay

"Homedics SoundSpa - Sound Machine

switched mono mini jack output
pitch up/down control
switchable feedback control
switchable bass overdrive control"

Alesis Andromeda A6 SN (21)A60500190

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via this auction

"Includes: Printed Manual, Power Lead, CD with 5 Soundbanks (Rob Papen, Klaus Peter Rausch, Joerg Huettner, Brian Kehew, Pim Schilperoort)... All voices tune perfectly. Serial Nº.: (21)A60500190, this is unit number 190, one of the very first ones (around 3000 units ever produced, so these synths are relatively rare). This means that this Andromeda was built in the USA (and not in Taiwan like the last ones produced after Alesis being bought by Numark)..."


Oberheim OB-8 with MIDI and Silver Side Panels

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via this auction

via the listing:
" Power Supply Rebuilt – Re-capped entire power supply with rare and awesome-sounding Samwha RD caps. Samwha caps, in general, are difficult to obtain here in the USA. However, many top notch OEM’s know how good they sound, which is why Marshall, Moog & Orange amps use them almost exclusively in their production. This alone, should speak volumes about their “tone”. However, as an OEM audio engineer, I have access to these wonderful caps and they are “sonic-sleepers” in my opinion. They sound awesome in quality analog synths too, of coarse, yielding big, fat, fluffy, smooth tone. Far superior to Illinois, Sprague and other brands. Try them for yourself, (if you can get them) and hear the difference!
Power Supply Rear-mount TO-3 regulators – were all replaced with custom gold electro-plated units. (Not available on open market, as these are custom plated parts).
Power Supply cable harness- rebuilt with thicker, high-quality copper strand wiring. This helps the power supply “breath” better due to reduced resistance.
Power Supply 723 regulator sockets- replaced; gold plated.
Power Supply 7815 (+15VDC)regulator – replaced; gold plated.
OB-8 Main processor board – Every IC, carefully removed, cleaned, tested and/or replaced as needed.
Power Supply trim pots - replaced with Bourns “plastic-conductive” type, The very best sounding trims available, since all pertinent power supplied to the OB-8’s specified pcb’s must pass through these pots. (Plastic conductive material has a superior “open” tone compared to carbon type pots).
OB-8 Voice Boards - were removed and cleaned. All CEM VCO & related chips were removed and cleaned and replaced with socket enhancement fluid. Both OB-8 voice boards also had all major capacitors replaced with Samwah RD caps.
OB-8 Panel Pot Boards - were removed and cleaned and all pots thoroughly cleaned, lubed and tested.
Special audiophile-grade solder -used on all replaced components for maximum sonic tone and transparency.
Midi Output Jacks -all replaced with Nuetrik/Rean brand.
Bend Lever Assembly -fully cleaned and lubed, All IC’s removed, cleaned, tested and/or replaced.
Keyboard assembly -was removed from chassis and disassembled. Rubber boot contact covers were removed and cleaned. Keypad contacts were all replaced with Sound Doctorin NASA type conductors. OB-8’s are notorious for key contact and misfire issues over time and this solution is the best yet.
Side-End Caps - were refinished/painted with special “stainless-steel” particle paint and then clear lacquered with many coats to achieve glass-like finish. Absolutely stunning and totally says; “I’m Special”!
Inner Chassis - was completely cleaned and new black colored end-cap fasteners were employed.
Fresh Data Dump - was re-loaded with Standard patches.
Midi & Arpeggiator Included! – This OB-8 has both midi and a fully functioning arpeggiator, which is not found on other Oberheim models such as Matrix 12, OBX-a etc.
Owners Manual & Technical/Schematics Manual - both included and bound & printed on high-quality gloss paper!

To top it off, the unit went through a full final check-up with Five Star Engineering in Mesa, AZ. (Dean there,is an ex-Oberheim employee/tech and extremely knowledgeable)! Unit is in full working condition."

Ramshackle synthesizer (GDAL Synth R1)


YouTube Published on Apr 23, 2012 by JingleJoe

"I am building an analogue synthesizer, it's so damn hard sometimes but it is finally working! :D"

Recue - Do Not Disturb

Recue - Do Not Disturb from recue on Vimeo.


"Do Not Disturb - Part 1

A live set built in a hotel room somewhere in Sweden based on messing around with random hip hop and pop-music vocals combining them with bits and pieces of unreleased Recue material. This performance video is the first part of the set. The complete 27:30 minutes of audio is freely downloadable on soundcloud.com/recue/do-not-disturb
More info on recue.net"

The iPad app is Liine's Lemur:
Lemur - Liine
iPads on eBay

A bit more heavily crunched tape... from recue on Vimeo.


"Another take on the tape-head distortion introduced here:
vimeo.com/19805122

More info:
recue.net/?p=219"

Sui Sibi Se Se - Of Love and Robots


YouTube Published on Mar 5, 2012 by SuiSibi

"In the studio working on a cover of Kraftwerk's "The Robots," which will be featured on the forthcoming Of Love and Robots EP. This (almost) all modular EP features covers of classics by Kraftwerk, Gary Numan / Tubeway Army, Giorgio Moroder, and more.

Sui Sibi Se Se - Of Love and Robots EP. Music for your self."

via Brandon Byrd on The MATRIXSYNTH Lounge

Update: the iPad Sequencer is Genome.

Moog Voyager XL Sale Ends April 30th


via Moog Music

"The Minimoog Voyager XL promotional price of $4495 ends on April 30th. Don't miss your opportunity to save $500 on the mother of all Monosynths!"

Original Frostwave Resonator MS20 Filter Clone Prototype

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via this auction

via the listing: "This is a rare prototype of the already rare Frostwave Resonator. When I first stumbled upon this I decided to contact Paul Perry, the man behind Frostwave, to try and get a little history on my new friend. He confirmed that this particular Resonator was indeed one of a kind. It was so early in production that he had not yet designed a housing for the Resonator, and just ended up using one of the original Funk.a.Duck housings. According to him, all internal wiring on this model is point to point, and with the purist in mind, this prototype is an exact copy of the MS20 filter section, part for part (this means no voltage control, sorry guys). This piece is fully functional, sold as is, with the orignal PSU, also kludged together by Paul Perry.

This is a very rare opportunity, and the closest thing to the MS20 sound without shelling out for an original MS. I've owned both this and the new Resonators, and this thing kills the newer ones. A lot can be said for point to point wiring, especially in high impedance circuit design."

This one in via brian comnes.

Update via Brian in the comments: "Note the linited I/O ports there's only two , the production versions had 4 CV inputs for cutoff and resonance for high and low filters"

ULT Sound DS 2 Pro Muzer Drum Synthesizer

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via this auction

"Up for sale is the ultra rare ULT Sound DS2 drum synthesizer. A very unique and interesting unit made in Japan around mid / end 70ies. It has two independent drum synth channels and sounds pretty good for it’s size. It can be triggered via gate or audio signals at the back of the unit. The drumpads in the case are not working anymore, they have been removed."



Oberheim Cyclone MIDI Arpeggiator

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via this auction

"This is probably the most advanced hardware midi arpeggiator / sequencer from the 80′s. It is possible to have three arpeggios simultaneously, 16 programs and patterns can be transposed, inverted and repeated. This unit has been checked and the power supply input has been modified for save use with wrong polarity by Virtual Music."

Oscillator annd Noise Section of MacBeth micromac


via Ken MacBeth on Facebook

"This is the Oscillator annd Nosie section from the *final* prototype #10 of the micromac. The pervious design was excellent but I had to cut one or two track and hand wire them. Now it is perfect and ready for test/production.

Also to be noted here- for the Desktop unit- the supply is now on board with an AC/AC adaptor firing power up. Ultimately- I considered the idea of using a switched mose supply- but the supply it's self was over half the size of the mac! So I designed the linear supply that you can see on the rear view, bottom right. Plenty of trim pots too as you can see. By tommorow- the VCF, VCA, Envelope Generators and the hands on control board will be built and match up to this circuit!"

Roland Jupiter-6 with Multi-colored LEDs

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via this auction

via the listing: "I had the synth serviced by an expert professional musical instrument repair company, serving the Pro Audio and Keyboard community - EPR Electronics in Florida in 2007. Here is a rundown of the work I had performed

Complete thorough cleaning of the interior and all boards.

Complete replacement of ALL Sliders with factory replacements.

Complete replacement of ALL Knobs/Potentiometers with factory replacements.

Replacement of the power capacitors.

Replacement of several resistors.

Replacement of main output jack.

Replacement of VCA IC Chip - Curtis 3360

Replacement of VCF - Roland IR3109

Replacement of internal memory battery

Replacement of many of the red LEDs on the control surface with blue, green, and yellow LEDs ( I got tired of the plain red). Now it looks as if you're at the helm of the Starship Enterprise."

EML -ElectroComp 101

Note: Auction links are affiliate links for which the site may be compensated.
via this auction

"This one is in beautiful cosmetic condition and working 100%. It has just come back from being serviced/restored and needs nothing. The original case was pretty thrashed so I had a new, custom cherry wood cabinet built by Analogics. As you can see, this cabinet/case looks beautiful and in my opinion much better than the original...

Cosmetically- Nothing is ever mint in my opinion, but this EML looks awesome. There will be some imperfections here and there, but they will be hard to see. As mentioned, the original enclosure was replaced with real wood as it was in terrible shape. It has news latches, new black anodized/stainless steel screws, new Switchcraft washers/nuts, new rubber feet, and a new Arp 2600 style handle.

Internally- Apart from any repairs, this one was fully disassembled, cleaned, all electrolytic capacitors replaced (all boards + power supply), many new Op-amps, has a new power cord, the keyboard disassembled and cleaned/lubed, new key bushings and the synth has been completely calibrated..."

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