Synthesizer DatabaseSolina Strings, well known from some Tangerine Dream classic albums, the String machine is polyphonic, has some envelope like contour and knobs for cello, violin etc.. .

ARP (Alan Richard. Pearlman) SYNTHESIZER -- ARP + Octave
(earlier under the name of "Tonus")


ARP Trigger info: gate pulse in/out 8-10V GROUND to positive.
EDP gate pulse out: 'S-Trig' (like moog and some korgs) and 9V GROUND to positive.
Rhodes Chroma go here...

ARP Synth overview / überblick..

the big one..

ARP 2500
ARP 2500 modular synthesizer
I don't believe there are too many of these digital sequencers made:

ARP 2500 with another wing
1970 made..
all modules are located in the middle,
no need for patch cords (well only a few)
the rest can be done by a special bus system..

on top: all inputs
on the bottom: almost outputs

if you set the bus to the same number they are on the same bus and can be routed together that way or modulate..

the sequencer is 10 step x 3 rows

about the digital sequencer on top:
This unit is one of a kind.
Not made by Arp.
Made by David McLey, of David McLey fame. (thanks to Kevin "synthfool" Lightner for info..)

ARP 2500 digital sequencer

the filters are quite special, there is a function called keyboard percussion using the resonating filter to be used for that, you can also set the notch on the main filter, there are envelope mmodules with LPF attached, dual ADSR , VCAs and double VCOs

the additional wing
arp2500 synthesizer wing cabinet
if you use the bus system you can have FM quite easily..

Movie ARP 2500: as mp4, 1.7MB (needs vlc to play or something, please prefer this one!)
(me tweaking the arp2500, some crackling sounds - only recorded via the mike in my camera, so it is no HiFi sound.. but you can hear the filter crackling stuff..)
if you cannot play mp4 (too lazy to install the best player for all platforms) use this: movie here (18MB),avi..

the 2500s S/H and VCO (dual) module..
ARP 2500 modular synthesizer

most pics can be enlarged..
just click on the images..

ARP 2500 modular synthesizer
below: instead of patchcords use the matrix!
ARP2500 modular synthesizer

3 lines for analog sequencing..
ARP 2500 modular synthesizer
THE ARP 2600
the modular synthesizer 1970 - not really semimodular btw. since you can still access and rearrange the modules and signal flow

ARP 2600 synthesizer family

3 VCOs and an LFO in the Keyboard
it can also trigger the Envelopes.
there are 2 ENVs,
1 AR
and a nice reverb spiral/spring hall

there are 4 versions (3 shown on the top pic here) there left red/black one and the white/grey/black ones are quite common, the right one is a very rare
ARP 2600 synthesizer
ARP2600 pic by/thx to Rob Schweizer

.. anyway the ARP 2600 modules are encapsulated and can not be opened by anyone, but there are ppl able to to so like achim lenzgen from synthesizer service, germany / namedy.
I'd strongly assume those modules are encapsulated like this because ARP "lended" the moog filter cascade, anyway it sounds a bit more "uncoloured" or less "typical moog" - some ppl say it is more "acoustic" in a way.. it's hard to tell - in words!..

some arp2600: thanks to robert schweizer for pic
ARP 2600 synthesizer

deutsche trigger info ARP:
ARP benötigt zum Auslösen des ADSR-ENV einen Triggerimpuls (kurzer Nadelimpuls 15 V), der den Hüllkurvenvorgang startet und einen Gate-Impuls (10 V), der letzendlich für die Dauer der Einschwingphase (Attack) und der primären Ausschwingphase (Decay) verantwortlich zeichnet. Nach Ablauf der Attack -und Decay-Zeiten bleibt der Hüllkurvengenerator auf dem eingestellten Sustainwert für die Dauer des anliegenden Gates, danach gehts mit Release "abwärts".

ARP2600 synthesizer

is also an ARP product but as you can see ARP died before but the Chroma has been released by rhodes!!..

want to see it? go here:

Rhodes Chroma

ARP made about 300 Avatar s , it's the "guitar synth" version of the odyssey and is more close to the 2600 (so does the odyssey) than you might think of.. it is the same features as ody. but it has more jacks for modular access. in fact you can simply add those to you odyssey,too!

the Avatar is a good transition product between the 2600 and the 2800 (odyssey)..
ARP Avatar

ARP Sequencer 1601

ARP Sequencer

it was cheap and has 16 steps.. quite a lot at that time for that money compared to a moog 960 .. DAF did a lot with this one..

the faders on all arp synths are a bit "rough"..
it had a quantizer on board, which makes it easy to set notes with continous sliders..

ARP synthesizer
(Alan Richard. Pearlman)
ARP Odyssey 1972 /
ARP Avatar 1977 ..
DAF and Conny Plank (known for producing Can,Kraftwerk, DAF etc.. in Düsseldorf/germany) used it (with a korg MS20) .. it has fast envelopes and was some sort of competition for the minimoog.. it had indeed more features than the mini. there have been versions with 12dB/oct LP-filters, later versions were equipped with 24dB/oct filters!! also the color has changed (white and black). also the tune potentiometer is only one option: other versions had 3 white "proportional switches" 2 OSCs and an LFO, S/h (lag time but no sample time slider as on the roland sh5) also a non VC-able HPF is there like on some rolands.
click on the images to enlarge them!!..

ARP Odyssey I + II - 3 model 2800 / 2810 designs
with pitch knob and ppc 12dB + 24 dB LPF Models
arp odyssey synthesizer family

the first version odyssey I was 12dB/oct, white and "golden" versions, after that also "golden"/black was the 2810 (odyssey II) first with pitch knob, later with propotional control pitch like the one here on the pic on the right, the later III model was equipped with 24dB/oct LPF and golden/black design, later models known as odyssey III were black with orange letters. ARP had internal numbers for the odyssey series since the filter module changed and the proportional control and pitch knob..
ARP odyssey
the ARP odyssey II with pitch knob looks like this..
ARP Odyssey II synthesizer

also good for percussive sounds..

want to mod your "ody"?
ARP odyssey synthesizer
some ppl modified this to be semimodular like the ARP2600
also the avatar can be modified, it is very close to the 2600 and odyssey.. maybe underestimated..
arp odyssey

CMS offers a modification (same for the avatar, which is in fact an odyessey without keyboard): there are a lot of mods possible with the ody/avatar , even for DIY: accellerate/slow down speed of the lfo, speed up the envelope, add inverted envelope (it's already there!! you only need a switch to route it), filter mod (3 resistors and one condensator to change here.. to widen the filter freq range), bridge the hpf or reduce it's bypassed "bass killing" effect, and more waveforms to route (cms also offers to convert some waveforms and adds a 12dB/oct filter!). and all modularized by adding nice jacks for outside communication. if you are in love with your soldering iron, it can be done in 1hour. but there is CMS, if you don't dare to to that yourself.

ARP odyssey (right)
want it larger? click here (vergrössern!)

octave made the "cat" that is very close to the odyssey (and went to court!)

strangely the VCO waveforms are switched at the mixer section.. most illogical? no this price goes to the yamaha cs30 where you need to forget all concepts of synthesizer panel designs ;) (anyway the cs30 is hammer for it's capabilities)

the proportional control:

Chroma is also made by ARP but was sold by Rhodes.. see extra page for the Chroma

ARP Axxe
ARP Solus
are both smaller one-osc versions of the Odyssey..
there are 2 versions (as always with arp): the golden and the orange/red on black..

Axxe: VCO - 1 LFO, 1 VCF (lpf) + S/H
the Axxe
arp axxe

Solus: 2 VCOs with PWM by LFO, 1 LFO and 24dB/oct LPF filter, one ADSR env. nothing special but possibly an alternative choice..

ARP Solus
ARP solus
made in 1975

the ARP Solus Versions
ARP solus

ARP Modules for Educational Use

click to watch..

arp educational modular synth
big brother

kind of expander , looks like the sequencer (the one on the left side),
1 VCO, 1 LFO

arp little brother

the big one is the Rhodes Chroma
it has its own section: Rhodes Chroma

ARP quadra
ARP omni

omni: a sting ensemble like sline string or comparable.. sounds nice.. but really 4 sounds only ;)
quadra: some "all in one" synth with string section.. from todays view more "exotic".. the synth section is not really "sophisticated" has mono bass synth, duophonic lead synth and poly string, one ADSR & 24dB/oct LPF..
a "full" orchestra kind of live synth those days,... but not really for making astounding sounds now ;)
ARP Quadra Synth

the ARP Pro DGX Series..
& omni (middle)

pro dgx: 1 VCO, 1 LFO, nothing special..
37 keys (top)

omni: 4pole lpf, lfo, "waves" are violin, cello,..
SDSR (omni 2) - 1977

including memories now..

a lot of good string synths came from italy, another one came from the netherlands.. some where simply bought from more known companies..

on top Explorer I
very simple - 1974, 1 VCO, LFO 1, ADSR VCA

ARP Solina Strings + explorer

Octave (Octave Plateau)
this is NOT an ARP product but imo it was best to place it here.. Octave ..

Cat.. (not stupid) some sort of copycat ;) hmm, odyssey? or.. 2 VCOs with 1 SubOSCs each (!)

what? it's about the same as the odyssey II / III, but it has 2 (two) suboscillators and you could blend those waveforms (instead of just switching like on the odyssey).. so it may still be a good alternative.. with the so called SRM update it could be played "duophonic"..

octave synthesizer range

so see this as an alternative choice.. there has been a smaller version "the kitten" with just one VCO but both were forced to stop production. copyright reasons..

most of them can be enlarged.. click on them!

more about Octave'S founder and inventor Carmine Bonanno.

octave kitten synthesizer
Octave CAT synthesizer

Octave Plateau,
later (86) Voyetra / Turtle Beach

-Voyetra eight

us-made quite exotic analog synth with digital memory..
8 voice

2 VCOs, saw,tri,pulse, sub
2x ADSR envs
1 filter lpf
white noise
2 LFOs, one with delay

there was a voyetra one also,but monophonic.
voyetra eight