MATRIXSYNTH

1971 Gibson Maestro MRK-2 Analog Drum Machine Box SN 15325

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video upload by keyboard resource

"Everything is hardwired: start/stop foot pedal, output cable (with 1/4" mono jack) and power cord. It has a little compartment in the back where you can stuff all the cables and pedal for carrying around with handle on top. The unit is front-heavy and has rubber feet on the back. So, I guess it was supposed to be laid flat on the back or mounted to a stand with a screw since there's a female screw socket on the center of the back. You can tweak the sounds with the trim pots inside including making the bass drum sound self-oscillate like a Roland TR-808."

via this listing

Pics of the inside below.

"Historic, simple, preset vintage drum machine. Works good. It's made for USA/Canada voltage (~115V 60Hz) and two-prong power plug. See video of actual item for sale.

Includes start/stop foot pedal. Everything is hardwired: start/stop foot pedal, output cable (with 1/4" mono jack) and power cord. It has a little compartment in the back where you can stuff all the cables and pedal for carrying around with handle on top. The unit is front-heavy and has rubber feet on the back. So, I guess it was supposed to be laid flat on the back or mounted to a stand with a screw since there's a female screw socket on the center of the back. You can tweak the sounds with the trim pots inside including making the bass drum sound self-oscillate like a Roland TR-808."

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Metasonix - T1 & D-2000 [The Happy Couple]

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via this listing, also on Reverb

NOISEBUG Reverb | Noisebug eBay

"Both units are preowned. Both units are in incredible condition. Each comes with the original PSU.

In a world where fury once ruled their independent hearts, T1 and D-2000 have forged an electrifying bond that transcends their explosive tempers. Once two of the angriest souls around, they discovered that beneath the surface of their rage lay a profound connection. Together, they channel their frustrations into a unique form of expressive tube warmth—Their voices resonate with a powerful mix of raw energy, screaming passion, and valve-charged melodic noise. In their whirlwind of emotions, they’ve found happiness not in calming the storm alone, but in celebrating it together.

The Metasonix T1

is incredibly rare. With only ten ever made, this unit is number 2.

From the Metasonix T1 owner's manual:

The T1 is our FLAGSHIP instrument! Our best/worst! It is an intentionally primitive device, using late 1950s technology for the entire signal path. Do not expect it to sound or behave like a Moooooog! Do not expect it to sound or behave like a copycat machine trying to sound like a Mooooooooooooooog! Do not furiously twist the knobs in search of the 1980s DX7 tone. F*** you and f*** the 1980s! Oh, and PS: there are no presets!

Metasonix - D-2000

WARNING: this is an extremely abnormal product . If you purchased it expecting to get 'TR606-like' or 'vintage-like' drum sounds, you will be sorely disappointed. WARNING: The D-2000 is NOT a 'Linndrum' or a 'TR606 simulation' or a sample playback device! Do not expect it to sound or behave like a classic drum machine or a real drummer! Do not expect it to sound or behave like a machine trying to sound like a drummer! It is ABNORMAL. It does NOT behave like other music products. Also, please do not power it up, experiment for a few minutes, and then quickly contact us, claiming it is 'broken' or 'bad'. Each new D-2000 was tested at the factory very carefully. Many of our past products were often returned with a warranty claim that they were 'broken'. And most such 'broken' units turned out to be working perfectly. We will publicly mock anyone who returns a working D-2000 claiming it is 'broken'. The D-2000 contains five drum 'voices', which use vacuum tubes, plus a monophonic mixer also using a tube. Pushbuttons are provided to trigger each of the drum sounds. The mixer also has a CV input that can be used to completely mute the output if desired. At the far right of the panel is an 8hp space for a Eurorack synthesizer module."

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Original Pearl Syncussion SY1 - SERVICED - Drum Synthesizer SN 511414 w/ Original Case

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via this listing

"Pearl Instruments Syncussion SY1 professionally serviced and tested.

One of the best table top synths out there which is fast becoming a cult classic amongst electronic producers looking for that raw sound. Fantastic for any electronic, dance, ambient, experimental sound...sonically it's one of the best imo.

Regularly maintained this comes from a London recording studio.

What you get:

Syncussion SY1
Original Case
Adapter
Flightcase"

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Studio Electronics Omega 2 - 2000 Blue SN 1047

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"Studio Electronics Omega 2, 2 voice analog synth. Includes 2 oberheim, moog, Roland, and arp filters (one for each voice). Note the ARP filters were bought years apart, slightly different board revision/tweaks, and sound is slightly/subtly different. Also was sent in for op-amp board upgrade to make it a little punchier. This is a sweet sounding synth, SE were on the vintage analog sound kick before it became big — a smooth beautiful sound. Blue face is not standard I think? Looks nice, sounds better. Internal battery replaced last year."

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Roland Jupiter 8 w/ Encore MIDI Mod

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"Super clean Jupiter 8 with midi mod. Purchased newly refurbished last year and only used in studio since. Cosmetically it’s in excellent shape, it functions flawlessly, and it sounds like a Jupiter 8 should (which is very good, for the uninitiated).

It‘s an older version from before midi was factory fitted, so this has the encore mod. It’s midi in only, and the port is the existing DIN sync port. Sync still works, just doubles as midi.

Local pickup in Brooklyn GREATLY preferred, but shipping within the lower 48 possible."

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OBERHEIM MATRIX 6

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ROLAND D-50 w/ Original Box

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Boss DR-55 Dr. Rhythm w/ Original Box

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Helical Autoregressive Synthesizer - first look

video upload by John Schussler

"This module really spoke to me when I saw the first demo. Very ambient, but
also with lots of potential since you can swap out the wave tables.

I don't have the expander yet, but will definitely be adding it since some of the
filter behavior possible with it isn't possible simply by adding a filter after
the module in your chain.

This is just the first look, so I've not tried swapping out the wavetables.
That will probably be an endless quest to find the "perfect" one, which
may or may not be fruitful.

Lots of reverb here. That's about it. And later in the vid some delay.

00:00 Intro
00:20 Drone
07:55 Short envelope
12:58 Sequence and modulation"