MC-4, Roland @ 10 September 2017, Comments Off on Roland MC-4

“Vintage Roland MC-4 MicroComposer CV/GATE digital sequencer for analog synths, modular synths. I own three MC-4’s so selling one to fund another purchase.


The blue screen is much brighter than it looks in the first 4 photos. Due to the smokey glass and reflections it was hard to capture the brightness of the screen. The last photo shows the correct brightness of the screen under normal lighting conditions. All segments are displaying properly. There are various scratches on the unit and some discoloration to the finish in spots as indicated in the photos.


Tested all 4 channels and CV1 and Gate were functioning properly. I did not test CV2 or MPX but no reason to expect these aren’t working. These sequencers are very reliable. All channels scale the voltages properly and the gate outputs properly trigger my Roland modular setup. Keep in mind this is a positive gate CV/GATE sequencer so it won’t trigger Moog or Korg units unless you have the proper cable made. All keypads on the front panel function (which is a rarity on these units). On the rare occasion if you don’t hit the number 2 key squarely in the middle it will occasionally double-trigger or you will need to press it again but that’s simply from lack of use. I’m confident it will clear up once it’s used more often. This sequencer has been in air conditioned storage for some time and I haven’t tested every single feature. I’ve tested the DIN sync input/output using a Garfield MiniDoc and it worked properly. I’ve not tested the cassette interface in/out but I have no reason to believe it isn’t working. Due to this being a vintage piece with a lot of older components, I’m listing it for parts or not working. I don’t want to deal with the hassle of returns so hopefully this will weed out the buyers that either try to scam sellers for rare parts or scam sellers for more money upon receipt (unfortunately I’ve dealt with many of these buyers before!).” Click here to visit listing on eBay

MC-4, Roland @ 12 March 2017, Comments Off on Roland MC-4

mc4 “There is no problem in operation. It is good.
It has a slight damage including scratches.
Please see pictures.” Click here to visit listing on eBay

MC-4, Roland @ 01 March 2015, Comments Off on Roland MC-4B

roland mc-4b“Item is in ‘mint’ condition, US voltage supply, from my smoke free home studio. All the keys function perfectly and there’s hardly a scratch on this unit! The original manual binder does have some duct tape on the sides. This is due to the notorious plastic binder Roland packaged the manual in, that always cracked!

I’m letting this unit go because I really don’t have the need for 2 of these just lying around my studio. I will mention the serial of this unit does indicate the ‘A’ version. But it is in fact the ‘B’ version hence the reason why I’ve included a snapshot of the additional installed memory board. The rear picture shows the optional MTR-100 interface installed confirming the ‘B’ version.” Click here to visit listing on eBay

MC-4, Roland @ 21 December 2014, Comments Off on Roland MC-4b

mc4b “ROLAND MC-4b MicroComposer CV/Gate-Sequencer

One of the best CV/Gate sequencer ever, especially famous for it’s tight timing.

In flawless original condition, cosmetically and technically.” Click here to visit listing on eBay

MC-4, Roland @ 19 October 2014, Comments Off on Roland MC-4

mc-4“This is the famous Roland MC-4 Microcomposer. It is a multichannel sequencer with CV (controlled voltage) and gate hookups. It can be synchronized and can control any synthesizer with CV connections.

This sequencer is in perfect working condition, and only has minor scratches that do not affect play. It is very clean, and has been kept in a smoke-free home. ” Click here to visit listing on eBay

MC-4, Roland @ 27 April 2014, Comments Off on Roland MC-4

“Beautiful shape Roland MC-4. Tight sequences ! CV control of your modular.” Click here to visit listing on eBay

MC-4, MT-100, OP-8, Roland @ 29 December 2013, Comments Off on Roland MC-4 with Roland MTR-100 with Roland OP-8

“I am selling my beautiful Roland MC4 system,
It’s in beautiful condition, looks great and works as expected.

It comes with original boxes for the MTR100 and OP8, but no cables to connect the MC4 to the MTR100 or the OP8 to a Juno. I had to borrow them to test it.” Click here to visit listing on eBay

MC-4, Roland @ 20 October 2013, Comments Off on Roland MC-4 with OM-4

“If you’re looking at this item there’s a good chance you already know about it. This unit is an MC-4A (US Voltage) that contains the optional memory board (OM-4) w/interface for the MTR-100. The OM-4 basically added more memory capacity to ‘A’ units thereby making them the same as MC-4B units (48 K byte version).

The unit is in excellent physical condition with only 1 small dent on the left front cheek (please see photos for details). The unit was also recently serviced and functions 100% perfectly. Issues fixed included, dead/non-responsive keypad and voltage control output issues (faulty transistor), calibration. ALL resolved/fixed. Buy with confidence here.” Click here to visit listing on eBay

MC-4, Roland @ 12 May 2013, Comments Off on Roland MC-4

“Own a piece of New Wave History. This step sequencer wasused by the likes or Vince Clarke and Human League on innumerable 80’sclassics. In great condition. ” Click here to visit listing on eBay

MC-4, Roland @ 10 March 2013, Comments Off on Roland MC-4

“Up for grabs is this Roland MC-4b in mint condition. Kept in a smoke free studio for the past 4 years and boxed in an attic for 25 years before that, this cv/gate sequencer is virtually in new condition with no scratches, signs of ware, or dings.

Sequence 4 analogue synths and din sync up you analogue drum machine to play along. Rock solid timing (makes midi seem sloppy by comparison), there’s loads of fun to be had with this bit of kit.

It makes a fantastic addition to any analogue studio and looks the business.

Used by Vince Clark, Aphex Twin, Moroder, Front 242 etc. Very reluctant sale due to needing to free up space and raise cash to finish a modular synth project.

Manual included (some cracks in manual’s plastic binder cover)” Click here to visit listing on eBay

MC-4, Roland @ 16 December 2012, Comments Off on Roland MC-4

“Roland MC-4B
(MC-4 with Roland OM-4 memory expansion, stamped as model MC-4B)
Rare and desirable.

Excellent condition.
Full working order.
All buttons just serviced to work like the day it was made! (Conductivity in the buttons fail over time. A common problem that is not an easy or a quick fix).
Japanese model 100V.
I can include the industrial, large, heavy, toroidal step-down transformer pictured for an extra £30 (cost me more than double that).” Click here to visit listing on eBay

MC-4, Roland @ 23 September 2012, Comments Off on Roland MC-4

“For auction is a Roland MC-4B CV sequencer. Although I’ve listed is as for parts, it’s actually working fine except for failing/dead contacts on a number of keys – unfortunately a common problem with these machines. If you can fix this, you would end up with a fully functional MC-4 in excellent condition. Alternatively, you could download MC-4 hack and program your sequences on the computer. This is a 220v unit.” Click here to visit listing on eBay

MC-4, Roland @ 29 January 2012, Comments Off on Roland MC-4B Project Machine

“I used to use it to control my Moog modular 55 console (a la Keith Emerson, Wendy Carlos and Tomita). It worked great in the recording studio, where I synced up numerous parallel tracks on multi-track tape recorders.

NOW, this particular unit has begun to mal-function and needs repair! I don’t know exactly how serious a problem it has. Symptoms: When powered on, it emits a shrill, high-pitched tone which does not stop. The display panel flashes momentarily, then goes blank. The three indicator lights: CMT, EDIT and PLAY all are lit up. When I push several of the buttons, a faint sound is added that is akin to the sound an old phone modem makes. That’s about all I can tell you. Prior to this, the unit worked fine. It still has something going on under the hood, I’m just not sure what.

My suggestion is this: either buy it for a discounted price and have it fixed, OR use the unit for spare parts to be put into other ailing MicroComposers out there that are still being used. If you buy it and repair it, you may have gotten yourself a fantastic unit at a great price. I have noted that working Micro-Composers sell for as much as $750.00 on eBay.” Auction ended. Click here to browse on eBay.

MC-4, Roland @ 16 October 2011, Comments Off on Roland MC-4

“This is a rare opportunity to own a really cool sequencer for your old analog synths! This MC-4 was state-of-the-art when it came out and certainly remains a unique, rare piece of equipment today, thanks to its unique calculator style interface. Use this with your vintage Moog, ARP, Oberheim, Roland, Sequential Circuits and other vintage analog synths. This Roland MC-4 is powerful enough to sequence FOUR SYNTHS AT ONCE (use 1 channel for each monophonic part) or, you can use this unit with a modular synth and patch the CVs and gates to anything you want.

Sequences up to 4 analog synths simultaneously!

4 channels of: CV1, CV2, Gate, MPX

External CV and gate in
Tempo CV in
External sync in and out (1/8″)
Calculator style keypad – enter your notes and step times with numbers
Cycle – loop function
Din sync in/out – sync it to your TB-303, TR-606, CR-8000,
TR-808, TR-707, MIDI to DIN converter, etc.
CMT tape sync in/out
Copy, insert, delete, replace
Cursor +/-
External control start / stop
and more…

This unit is in excellent working condition, with very few marks on the facing and side panels as shown.

All buttons and switches function properly. No problems with the screen or the LED’s” Auction ended. Click here to browse on eBay.

MC-4, OP-8, Roland @ 25 September 2011, Comments Off on Roland OP-8M and MC-4

“Extremely rare digital/analog sequencer , especially in this condition, legendary because of its extremely tight timing and groove….MC 4b was serviced by Basskozept studio – a leading Italian service center for obscure synths & peripherals. All push buttons, which are usually not working properly, were replaced by new ones, so they will work flawlessly for years. He also upgraded the power supply and changed the electrolytic caps in the unit. This is the version with expanded memory – whopping 48Kbs. More then enough for any song. Included in the package is even rarer CV to MIDI interface OP-8M which was also serviced recently (all capacitors replaced, upgraded power supply, cleaned and calibrated…), so you can drive your MIDI synths with it. I guess that you can’t find a combo like that in that condition easily if at all.” Auction ended. Click here to browse on eBay.

MC-4, Roland @ 04 September 2011, Comments Off on Roland MC-4

“Roland MC-4A Microcomposer microprocessor based sequencer. Very rare. Used by Vince Clarke, Giorgio Morodor, Aphex Twin etc. Good condition and functions perfectly as far as I can tell. There is only a small bit of damage to the left corner which is visible in the pictures. I received the item in this condition several years ago and have taken very good care of it. This is the MC-4A model without the expanded memory. It has the European two prong plug and works at 240 V. I have an adapter/step up transformer that allows it to be used at 120 V input from the North American style plug, which I will include if desired. ” Auction ended. Click here to browse on eBay.

MC-4, Roland @ 10 July 2011, Comments Off on Roland MC-4

“Roland MC-4b Microcomposer CV/Gate sequencer with expanded memory, OP-8 CV – DBC interface for Jupiter 8 and Juno 60 synths. Also comes with the MTR-100 tape interface. This rare to find Roland MC-4b full set is known as one of the tightest sequencers ever made and is a much more useable unit than it’s predecessor the MC-8. The programming style is not too different from a Roland MC-202. This unit is also really useful at controlling modular synths. There is a lot of info on the web regarding it’s use if you care to Google it.

The MTR and OP-8 are in great condition for their age with no major blemishes but the MC-4b suffers from the surface corrosion similar to many Rolands of it’s age. The display is flawless and apart from the ‘SHIFT’ button needing a few presses to activate, the unit operates 100%. I have had a look at the mechanical switch under the shift button and the contacts may just need cleaning. The units all operate at 240v.

The MTR-100 powers up but I have never used it – I backup all my sequences in my workstation as an audio file (any audio recording device will do) I have posted a video of a pattern loading below.

Included in the sale is the cable that believe is the correct cable for the MTR if you would like to hook it up and I will supply the user manual as a PDF and the original User guide/folder from Roland (not pictured here). There are many instructional videos on youtube and I have included links to this actual unit controlling a juno 60 via DCB below.” Auction ended. Click here to browse on eBay.

MC-4, Roland @ 12 September 2010, Comments Off on Roland MC-4

“Vintage Roland MC-4 Micro Composer Sequencer

Unit in great condition

Vintage unit with 4 CV gate inputs and 1 Din Sync

Sequence old analog CV gate instruments

This is a very cool unit

A must have with your collection of vintage gear

Unit last used about 12 years ago

I don’t have any CV gate instruments to check it out so

Unit being sold AS-IS” Auction ended. Click here to browse on eBay.