Roland System 100m


Roland in their early days, circa 1972 in Osaka, Japan.


Founder & Chairman Ikutaro Kakehashi is 8th from the left on the back row, second from the left on the front row is Dan-san (President) and sixth from the right on the back row is Noriyasu San who would later design the famous VP-330.

More names to come as we're able to identify them.

Background and context:

Roland's path into modular synthesizers is quite interesting because it's kind of counter to what the American pioneers were doing. In the late 60s and into the early 70s Moog, Buchla and ARP had built famous modular systems, but by 1973, Moog and ARP in particular were turning their focus to smaller, more portable instruments without patch chords as well as polyphonic synthesizers. By contrast, Roland started small with the humble SH-1000 in 1973, which was Japan's first mass produced synthesizer. It was in the vein of the ARP Soloist and Pro Soloist and in fact, Roland's second synthesizer, the SH-2000, owes a lot to the Pro Soloist when you sit them side-by-side.

Roland then went the other way, building more complex instruments as well as expanding into string synthesizers and electric pianos (and much more). It wasn't until 1975 that they released something modular (well, semi-modular) and that was the System 100 which comprised a five main sections:

  • 101 Monophonic Synthesizer

  • 102 Expander

  • 103 Mixer

  • 104 Sequencer

  • 109 Speakers

In 1976 came the System 100's big brother, the System 700. The latter remains the most expensive instrument Roland ever made and a full system cost ¥2,650,000 at the time.

Here's a couple of demos I cooked up earlier:

The System 700 main console is a cross between an ARP 2600 and the Moog Modular Systems, although Roland added many of their own ideas. I guess they benefited from seeing what had worked in the past and been able to consider what else might work in the future. The 700 included five additional blocks (including a distinctive sequencer) that cemented its place in iconic synth history.

In late 1978 came the System 100m which was somewhat of a cutdown, affordable version of the earlier 700. In some ways, 1978 seems surprisingly late to be releasing a new analogue modular synthesizer when poly synths, drum machines, sampling and digital tech was coming fast (which Roland were also a big part of), but obviously it was the right choice because they kept making it until late 1983. I'm glad they did because it's one of my favourite synths ever.

System 100m 4 Cab

As with the System 700 above, here's some videos of the System 100m in action.

The Modules


This module includes one oscillator with switchable triangle, pulse and sawtooth waves. There's manual pulse width modulation that can be defeated with a patch cable for external pwm. There's broad range adjustment from 32' to 2' and with the additional pitch knob you have a range from 1Hz to 30 kHz.


The VCO is normalled to run directly into the resonant low pass filter (24 dB per octave) which has a second input and two modulation inputs with the first being normalled to track the CV or keyboard inputs of the cabinet the module is housed in.


The VCA has two inputs with the first normalled to the VCF. It has two modulation inputs and is normalled to share one with the VCF (which can be defeated if required). It has two outputs and an initial gain knob to boost the gain or force the VCA to remain open continuously.

112 Dual VCO

A more comprehensive oscillator module with two independent VCOs that provide switchable triangle, pulse and sawtooth waves.


Unlike the VCO on the 110, the 112 includes both manual and external PWM, phase sync (aka oscillator sync) with weak and strong settings and sync input/output jacks on either oscillator.


There are two VCO outputs and three modulation inputs per oscillator (with the first normalled to track the cabinet / keyboard CV input).

121 Dual VCF

Following the concept laid out in the 112 we have two independent low pass filters in one module.


Each filter has resonance and will self oscillate at higher settings.


There's also a switchable high pass on each filter that cuts at 1kHz, 2kHz or 5kHz.


Each filter has three inputs and two outputs as well as three modulation inputs (again, the first is normalled to track the cabinet / keyboard CV).

130 Dual VCA

Finishing up the dual modules we have two independent voltage controlled amplifiers in one module.


These each have three signal inputs, three modulation inputs and a high and low output.


The amplitude can be switched between linear or exponential control response and there's also an initial gain knob on each VCA as per the 110.

System 100m 131.jpg

131 Output Mixer

A four channel stereo mixer with independent panning for each of the channels.


There's a master volume knob, stereo outputs, a mono output and a headphone output (with its own level control). The outputs have both mini and 1/4" jacks.


There's also a "standard oscillator" that outputs switchable frequencies of 220Hz, 440Hz or 880Hz so you that have a fixed tuning reference for the system (very handy).

System 100m 132.jpg

132 Dual CV/Audio Mixer & Voltage Processor

Probably the most esoteric module on the System 100m, the mixers can be used to sum control voltages and/or mix audio signals.


The mixers are normalled to contain a positive and negative voltage source and there are two inverted and two non-inverted outputs for each mixer.


The voltage processor provides a continuously variable positive voltage (0 - to +10 volts) and a continuously variable negative voltage (0 to -0 volts), each with its own output.

140 Dual Envelope and LFO

Two ADSR envelopes that can be triggered by gate, gate + trigger, an external gate or via the manual momentary switch.


There's two positive outputs and one inverted output per envelope.


The LFO has a range from 0.05Hz to 30Hz and has five switchable wave forms (sine, triangle, square, sawtooth and reverse sawtooth).


There's broad frequency (L, M, H) and fine frequency control with additional delay.


The LFO can be switched to phase lock to the cabinet keyboard trigger and it also has an input to control or modulate its frequency from an external control voltage.


It has two outputs and a switchable output level.

150 Ring Mod / Noise / S&H / LFO

The ring modulator is normalled to have the 150 noise and LFO as its X&Y, but these can be defeated with patch cables and any two signals of your choosing.


The noise generator has two white and two pink outputs.


The sample and hold can run on its own clock and sample voltages from the 150 noise or LFO, but you can externally clock it and give it any external signal to sample from.


There's also continuous lag time, clock output and s&h output.


The LFO is as per the 140.

165 Dual Portamento

Has CV input and output for each channel with a continuous slider to introduce portamento or slew between voltages. There's a control input for the portamento.


There is also an MPX input with associated slider. This is for connection to one of the Roland sequencers of the day such as the MC-4 or MC-8 so that you can switch portamento on or off with initial depth (or so I read, without said sequencers I've never been able to try it).

172 Phase shifter / Audio Delay / Gate Delay / LFO

The phase shifter has an input and output, an on/off switch, modulation intensity, shift frequency and resonance. The modulation has a normalled connection to the onboard LFO, but this can be defeated with a patch chord that brings an external control signal.


The audio delay is setup as per the phase shifter but its effect is a delay of between 0.3ms - 0.7ms. In fact, "delay" is a misleading term because very short delays like this create flanging effects and this really is better thought of as a flanger.


The onboard LFO is useful, but very basic. It produces triangle and inverse triangle waves (with outputs for either) and has a frequency knob.


Finally we have the gate delay. This takes gate signals, trigger signals and even audio signals (if they're within the right range) and reshapes them into a gate output that can be delayed by anything up to 6 seconds.


The threshold is basically a gain setting in case the incoming signal isn't strong enough. The original documentation refers to this being added to assist with low level pulse signals recorded to tape.


173 Signal Gate and Multiple Jack

A rare utility module.


There are four switches with an input and output and then inputs for normal or inverted gate signals that flick the associated switch on or off. These can be used as crude VCAs but they can also be used for voltage controlled mixing of audio or control signals.


The multiple jacks allow audio and/or control signals to be combined and/or multiplied.


174 Parametric EQ

Another rare module that was released late in the 100m story.

There are four bands with frequency, band width (Q) and bipolar level. There are knotches in the level sliders so that the zero point can be found quickly.


There's one input and two outputs, plus a bypass switch.

182 Sequencer

Can run as two parallel step sequencers (with up to 8 steps) or as one series with up to 16 steps.

There's an internal clock and tempo control, but it can also be externally clocked. Below that is portamento which works globally when in series and on channel one only when in parallel. Down again there's gate time which works globally.


Below that is a step knob. In parallel this defines how many steps the sequence is and in series this defines how long channel two is which allows for sequences of 9 - 16 steps.


In repeat mode the sequencer runs continuously, in step mode it steps forward every time an external trigger signal is received (input at the bottom of the module) or every time the manual momentary switch is pressed. In single mode the sequencer runs through once each time it's triggered.


The control voltages on each step have a switchable range of either 3 volts (for 3 octaves) or 10 volts (for 10 octaves) but this can be altered via the 132 module if you wanted something else (e.g. 1 volt for a single octave).

Prototype / limited run modules

I've never seen any of these in person and I've only seen photos of the 111 and 160, so I'm not certain that any of the others actually made it out into the wild. The 171 would make sense as there was a similar "interface" module on the System 700, but I'd love to know if anyone out there actually has any of these:


111 VCO / VCF

120 VCF / VCA

141 Dual Envelope / Gate Delay / Inverter-Adder

160 Computer Interface

171 Pitch to CV / Envelope Follower / VCA 


The rare 160 "Computer Interface" 

prototype module and also a photo of a System 100m connected to a Roland CMU-800 Compu Music and a Commodore 64.

This shows the early days of the shift towards computer sequencing which has now been the industry standard for decades. The Roland MC-8 and MC-4 were precursors to this.

Photo credits Dr Hannes Grobe (Creative Commons)


On this subject, an interesting photograph I came across is this shot of Goudou Irukayama in around 1983. Goudou is an engineer who had an impressive synthesizer collection at one point.


I'm hoping to get this article translated soon, but for now, the thing that caught my attention was the two 160 Computer Interface modules in the System over his right shoulder that are connected to a computer to the left of the shot.

I'm still trying to ascertain what kind of computer that was and how exactly it interfaced with the synthesizer, but this photo shows that it was working at one stage.

It seems the 160 was abandoned because of the move to midi at around the same time and as such, serial numbers for these modules that I've seen are 00002 or 00005 etc (which don't even follow formal Roland serial patterns). So it seems it was abandoned very quickly whilst still at a prototype stage.

System 100m RYK 185.jpg

RYK 185 Sequencer


In 2008 Ryk Modular designed a new module for the System 100m, the 185 sequencer. A limited run was released in 2009.


This sequencer improves upon the original by adding:


  • 4 gate modes per stage

  • 1 - 8 repeats per stage

  • Portamento per stage

  • 4 playback modes (forward, ping-pong, random and fixed)

  • 4 step division modes for repeat variations

  • Clock in / out


These features mean that all kinds of different sequences are possible that could not be achieved on the original 182.

There were later firmware updates that I'll list at a later date when I have the details, but this included a split mode.


In 2021 a revamped 185 was released.


  • 8 gate modes per stage

  • 1 - 8 repeats per stage

  • Portamento per stage

  • 4 playback modes (forward, ping-pong, random and fixed)

  • Multiple voltage options

  • Programmable split with repeats

  • Parallel split with separate CV/Gate out.

  • Midi In/Out

  • Clock in / out


190 3-module case

191 Rare 5-module case without multis

191-J Most common 5-module case


180 Basic 2.5 octave monophonic keyboard with transpose switch, tuning and portamento

181 Mid-range 3.5 octave monophonic keyboard as per the 180 but with additional bender

184 The top-end digital scanning 4CV keyboard that outputs 4CVs and 4 gates for polyphonic playing! It's essentially the keyboard from the Jupiter-4 and includes an arpeggiator (with rate and hold), 4 assign modes (unison, poly unison, poly reset, poly cycle), pitch bender with sensitivity control, portamento and tuning.

184 Polyphonic 4CV Keyboard
4 cab with 184 Keyboard
Haruo Noriyasu

Haruo Noriyasu was MD of Roland at the time. Here he is with a 100m in an article titled "I met Dr Moog for the sake of the development of synthesizers" that I hope to get translated soon.

Mr K 100m

Ikutaro Kakehashi with the System 100m

Roland Catalogue

100m Catalogue

System 100m Catalogue

100m Spec Sheets

MC4 and System 100m

100m Systems

System 100m module 150

Module Specs

System 100m Patch Sheets

Patche Sheets

The Biggest 100m in the world (probably)

Hans Zimmer probably has the biggest 100m system in the world and from photos I counted 130 modules in a custom wall-mounted setup in his studio in LA. I had a conversation with composer and producer Jeff Rona and it turns out that he was involved in that story. He had been an employee of Roland a few years prior.

The recollection is duplicated here with permission:

A little after I left Roland I was at a theater performance here in LA. The play was about a man in the near future with a robotic companion. The theater wanted to make the man’s flat look slightly futuristic and it was stuffed with a wall of 100m modules. Interesting choice of home decor. I figured it was because the president of Roland US, Thomas Beckman, was on the board of the theater group and must have loaned them out. I called Tom (my boss of 4 years) and asked about the modules. He asked if I wanted them, and I said ‘of course.’ He said he’d sell them to me at $100 each IF I BOUGHT EVERY LAST ONE - these were the last modules in the US. There were at least a couple hundred. 


  So I made a deal with Hans Zimmer for us to go in on them together. I built a medium sized rig, and he built a much larger one. But that’s where his system came from. 

I remember I went to the Roland US warehouse and just loaded all the boxes up - they'd all been thrown together into several large boxes. They were so glad to be rid of them. 

Back in Black:

In 2016 Roland announced their first modular synthesizer in 30 years; the System 500. In collaboration with Malekko Heavy Industry and inspired by both the System 700, System 100m and SH-5, the System 500 has nine modules available to date. I gave it a whirl in the video below.


In 2021 I got a very rare opportunity to put all of Roland's Systems together in the same place at the same time. The video below shows comparisons of them all, as well as musical performances.

Clones and Influnce:

Numerous clones and software versions have been created over the years, largely in eurorack format. Rob Keeble of AMSynths is noteable as he's created his own versions of the 100m.

Photo - AMSynths



Rob was then a fitting choice for Behringer who announced a comprehensive re-issue in eurorack format in 2020. This was dubbed "The System 100".

Each module was meticulously recreated with some modules being combined for efficiency (e.g. the "297" being a combination of the original Roland 132 and 165 modules).