Keio/Korg Donca Matic Universal

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via this Reverb listing

This might be the first Donca Matic Universal to be featured on the site.

Two pics of the inside below.

"At Herscheid & the Headbangers: Super rare Keio Donca Matic Universal Drum Machine in fair condition.

Fair condition because some functionalities are not reliable like the start/stop button. (Unit is always on basically). When using it I would just flip the sound/silence switch.

Sign button responsible for the metronome and cue will engage about 80% of the time. I doubt that many musician today will be using that feature but still prefer to mention it.

There's also a clock / clicking sound when volume is past 60% - 70% so it would benefit further amplifying before next stage or unit

EQ in perfect working order

The magic solo feature is fully working

All potentiometers are turning smoothly without scratchy noises

Both high and low impedance outputs are functional. I couldn't test the (very) old speaker connector

Tempo knob and Tempo Matic / Common functionalities perfectly working

Every program / style is working, same for every instrument + their respective on/off switch

FOX SWING section super fun to use! In good working order. The normal/quick button is working but seems to be reversed. Swing / normal working and properly set.

ADLIB MANUAL: Nice feature but will not necessary replicate the notes shown (It's basically depending on if other settings are engage or no. I don't think it was designed like this, just the old age of some components most likely responsible for this behavior)"

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Oberheim DMX Classic Vintage 8-Bit Digital Drum Machine Unique Custom Build

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via this Reverb listing

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Kawai / Teisco SX240 with Tauntek OS & New Memory Battery

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via this Reverb listing

Full Tuantek info & specs below.

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Hypnotriod Beatsqueezer

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via this Reverb listing

Demo in the listing previously posted here.

"Super cool totally amazing sounding hi-fi sample player. These were made in Ukraine a while back by a developer and made in small batches."

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Moog Memorymoog Plus Polyphonic Analog Synthesizer Keyboard SN 2427

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via this Reverb listing

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Roland Jupiter-8 61-Key Analog Synthesizer w/ Dust Cover Serviced SN 413230

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via this Reverb listing

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Roland Jupiter 6 w/ Europa Mod

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via this Reverb listing

"Roland Jupiter 6 + Europa in near mint condition. The most beautiful you have ever seen. Checked and serviced by Mark Cox, best technician in the Netherlands (i.m.h.o).

Stuff that has been done:
- cleaning of volume knob
- repairing of VCF sustain slider
- cleaning of VCF key follow
- cleaning of VCA attack
- cleaning of keyboard
- removal of dust
- replacing of VCF capacitors
- adjusting of VCF
- testing

Including original Roland manual and manual for the Europa modification."

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Waldorf Microwave XT Rackmount Wavetable Synthesizer 30 Voice

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via this Reverb listing

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Yamaha Motif-Rack ES w/ Original Box SN JAMN01038

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via this Reverb listing

"You need lots of sonic choices from authentic to innovative, that's why there are 1152 voices [patches] and 65 different drum kits in the new Yamaha MOTIF Rack ES. With the most advanced synthesis on the market, ES Rack's 128-note polyphony, 16 part Mix architecture and 32 multi libraries insure you have the all the flexibility you need.

Massive collection of studio sounds More effects than any other rack module Flexible synth architecture for creating your own sounds Studio Connections software provides plug-in-like operation Expandable with Yamaha PLG cards Digital I/O plus six analog outputs"

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ROLAND PROMARS MRS-2 COMPUPHONIC SYNTHESIZER SN 840678

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via this Reverb listing

Pics of the inside below.

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Ensoniq Fizmo Rack w/ Original Box SN 069977065

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via this Reverb listing

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Original EMS Synthi A AKS VCS3 Germon Owners Manual, Handbook, 2nd Edition 1980

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via this Reverb listing

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EMS Cricklewood

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via this Reverb listing

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Roland PB-3000 Rhythm Plus Vintage Analog Drum Machine SN 573243

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via this Reverb listing

The only other post to mention the Roland PB-3000 on the site is this one in 2015 for a massive synth sell off.

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VG-Line TBX 3Q3

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VG-Line TBX 3Q3 — raw sound video upload by VG-Line

You can find an additional demo here.

via this Reverb listing

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1983 Sequential Prophet 5 Rev 3.2 61-Key 5-Voice Polyphonic Synthesizer w/ MIDI Kit (Serviced) SN 4110

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via this Reverb listing

Additional SYNTH CITY Listings

Pics of the inside below.

"The Prophet‑5 (Rev 3.2) captures the essence of that classic Sequential tonality—warm, bold, and musical—with the resilience of newer chipset reliability. Whether dialing rich analog basses, lush pads, or punchy leads, this unit delivers that unmistakable vintage vibe. Fully serviced and MIDI-ready, it’s ready for studio or stage. (Serial no. 4110)

Includes ATA flight case as pictured for safe shipping.

Service notes:

-Replaced secondary stage power supply caps
-Removed and cleaned panel board and controls
-Resoldered panel pots
-Cleaned chassis and internally
-Serviced key-bed: cleaned buss bar and key contacts
-Replaced memory battery and loaded preset data
-Checked all calibration and adjusted as necessary"

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ELI CompuRhythm CR-7030

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Playlist:

1. ELI CR-7030 Beat Box Analog Drum Machine Demo by Daniel’s Electronics

This is supposedly a clone of the Roland CR-78, however functionally it is closer to the CR-68. It has no programming ability and the sounds, while good, are not as varied as the CR-78. The demo includes some slight reverb effect.

2. ELI CR-7030 Drum machine Beatbox demo by Momtnz

Rare ELI CR-7030 CompuRhythm drum machine. This unit was also badged as a Gemini and Ness unit. The CR-7030 and nearly three hundred other preset pattern drum machines can be found in the recently released book RHYTHM MACHINES, out now on Amazon.com and Amazon.co.uk.

(AUG 2018) RHYTHM MACHINES 2 - The 1980s Drum Computers is released! Written by Alex Graham. The most comprehensive book on 1980s Programmable drum machines out there, over 200 fact filled ALL COLOUR pages...Available only on AMAZON.COM and AMAZON.CO.UK.

Rhythm machines – the precursor to what we in the modern age refer to as a drum machine. This book documents the emergence of the preset pattern electronic rhythm instruments that (for a time) were used as a viable alternative to the drummer. Contained within are the Rhythmates, Rhythm Aces, Rhythm Boxes, Rhythmers, Rhythm Kings, Rhythm Masters, Donca Matics, Mini Pops and many more. Nearly three hundred rhythm instruments are documented here, with over two hundred pictures and information provided on their country of origin, instrument sounds, patterns and features. The book is a ‘must have’ for collectors, vintage instrument enthusiasts and recording artists.

For information on purchasing this unique book, follow the link here:

Rhythm Machines: The rise and fall of the presets

(Jan 2018) Also available, the newly released book RHYTHM MACHINES III (3) - From Decline To Retro Designs by author ALEX GRAHAM, now found on Amazon.com (USD$26.95) and Amazon.co.uk (19.95 GBP). The book has 150 full colour pages and covers information (with photographs) on all commercially released drum machines released from 1990-2017, featuring Akai, Korg, MFB, Jomox, Elektron, Roland, Zoom, Yamaha and many others including Cheetah, Arturia and Dave Smith Electronics/Linn etc.

Rhythm Machines III: From Decline To Retro Designs

3. ELI Compu Rhythm drum machine quick demo by Momtnz

"ELI CR-7030 Compu Rhythm demonstration. Preset box clearly modelled on the Roland CR-68/78 but manufactured shortly afterwards in Taiwan. Good to see an adjustable power option 110/240v selecter fitted. Has an interesting 'Rolling' feature that provides a fill-in pattern to break up the monotony of the preset patterns. In truth there are only three or four patterns that are that great and useable (Rock, Disco etc.). And the ''Guiro' field full of crickets sound is annoying to most but is easy to cancel out. For more information on rhythm boxes why not check out either the all-colour Rhythm Machines book by Alex Graham [links above], or the black and white (cheaper) version called Drumfax 1. Both are available on most Amazon sites."

via this Reverb listing

"Very rare vintage analog drum machine from the late 70’s it has a very similar sound to the CR line of drum machines from Roland, very good condition for its age minimal scuff marks and scratches around the case. Everything seems to be functioning as it should, volume knob and balance knob are a bit scratchy I’m sure it can benefit from a good cleaning.

Believed to be the first unit to use the term 'Beatbox' and"Compurhythm'-little info on this unit can be found but either ELI copied Roland or vice versa."

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Keynote Auto-Rhythm – Vintage Analog Drum Machine SN 1230

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via this Reverb listing

You can find a demo of one previously posted here.

"The Keynote Auto-Rhythm is a charming and rare vintage analog rhythm box with a warm, lo-fi character that's perfect for organ players, beatmakers, and lovers of vintage gear.

It offers a selection of preset rhythms (waltz, bossa nova, rock, etc.), all with that nostalgic, slightly gritty analog tone that cuts through in the best way.

Despite its simplicity, it’s surprisingly musical—and fits right into modern setups for sampling, live looping, or retro grooves."

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Hillwood HR-2 Super Variation - drum machine SN 770349

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via this Reverb listing

You can find demos of one in this previous post.

"This Hillwood Super Variation is a unique and rare rhythm machine that blends fully analog drum sounds with clever digital features for a truly distinctive playing experience.

The analog circuitry delivers punchy, vintage percussion, while the rhythm patterns are stored on an IC chip—resulting in surprisingly complex and musical grooves. A built-in LED beat counter adds a nice visual touch during playback.

One of its coolest features: you can trigger multiple rhythms simultaneously for wild, layered beats. You can also selectively mute individual drum sounds for more dynamic control.

Start the rhythm either by touching the metal pad on top or via an external footswitch (not included). This unit runs on 220V."

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Marshall Time Modulator 5002

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via this Reverb listing

"Flange like no other

Marshall time modulator 5002~A
rare, very rare at this price especially

List of some uses

1. NEGATIVE (COSIN) FLANGE, 95 DB+ CANCEL, 105 DB+ TDR

1. POSITIVE (SIN) FLANGE, AS WITH TWO TAPE DECKS, ALSO 105 DB

1. ECHO, WILL RECIRCULATE FOR MORE THAN 15 SECONDS

1. DRUM TUNING, PANEL OR KEYBOARD CONTROLLED

1. AUTOMATIC DOUBLE TRACKING, WITH PITCH AND TIME ERROR VOLTAGE CONTROLLED

1. AUTOMATIC TRIPLE TRACKING, WITH SEPARATE DETUNE ON EACH TRACK

1. CLEAN, TRUE VIBRATO, WITH OR WITHOUT ADDED DELAY, OR A COMBINATION.

1. CHORUS, DELAY CHORUS, SPINNING-SPEAKERS, AND THE LIKE

1. DRUM SLAP, ORIGINAL PLUS TWO WITHOUT RESORTING TO ECHO

1. HIGH Q FILTERING (Q OF OVER 200 POSSIBLE) STATIC OR DYNAMIC

1. PITCH QUANTIZING, ANY SIGNAL. RE-ASSIGNS PITCH BY RESONANCE

1. ARPEGGIO, TRANSPOSES INPUT SIGNALS ALTERNATELY UP AND DOWN BY MUSICAL INTERVALS

1. CARDBOARD TUBE ECHO, VOLTAGE CONTROLLED TUBE LENGTH

1. LOUDNESS ENHANCEMENT, PULLS VOCALS OUT FRONT AT CONSTANT AMPLITUDE

1. HARD REVERBERATION, MULTIPLE TAP-SUMMING FOR SOFTER REVERB

1. DOPPLER PANNING .. AND ON AND ON …​​​​​​​​​​​​​​​​

Slight compression affect similar to tape, the MTM utilizes A dbx 303 "compander" card,
And many many other great delays. You can’t get this with any kind of software emulator you can sculpt sounds, notching, phasing , chorusing it just goes on and on. It’s incredible , and the flanging is extreme or subtle if you like. It’s quiet as a mouse. It is unlike anything out there.

Martin Hannett, Stevie Wonder, Star Wars, Joy Division, and You!
It was fully serviced by David Kulka at studioelectronics in 2022"

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