Modular synthesizers are synthesizers composed of separate modules for different functions. The modules can be connected together by the user to create a patch. The outputs from the modules may include audio signals, analog control voltages, or digital signals for logic or timing conditions. Typical modules are voltage-controlled oscillators, voltage-controlled filters, voltage-controlled amplifiers and envelope generators.
CV/gate is an analog method of controlling synthesizers, drum machines, and similar equipment with external sequencers. The control voltage typically controls pitch and the gate signal controls note on-off.
The ARP Odyssey is an analog synthesizer introduced by ARP Instruments in 1972.
Doepfer Musikelektronik GmbH is a German manufacturer of audio hardware, mostly synthesizer modules, based in Gräfelfing, Upper Bavaria and founded by Dieter Döpfer. The product range covers analog modular systems, MIDI controllers, MIDI hardware sequencers, MIDI-to-CV/Gate/Sync Interfaces, MIDI master keyboards and special MIDI equipment.
The Voyetra-8 (Voyetra-Eight) is an eight voice polyphonic analog synthesizer. Released in 1982 by Octave-Plateau Electronics, it was one of the first analog programmable synthesizers to be rack-mountable and remains one of the most flexible digitally controlled analog synthesizers.
The Korg MS-20 is a patchable semi-modular monophonic analog synthesizer which Korg released in 1978 and which was in production until 1983. It was part of Korg's MS series of instruments, which also included the single oscillator MS-10, the keyboardless MS-50 module, the SQ-10 sequencer, and the VC-10 Vocoder. Additional devices included the MS-01 Foot Controller, MS-02 Interface, MS-03 Signal Processor, and MS-04 Modulation Pedal.
MOTM is the name of the modular synthesizer system manufactured by Synthesis Technology. MOTM is an acronym for "Module of the Month".
The Moog model 2090 Micromoog is a monophonic analog synthesizer produced by Moog Music from 1975 to 1979.
The KORG Poly-61(PS-61) is an analogue programmable polyphonic synthesizer released by Korg in 1982, as a successor to the Polysix. It was notable for being Korg's first largely "knobless" synthesizer - featuring a push-button interface for programming, dispensing with the Polysix's knobs and switches. The Poly-61 also uses digitally-controlled analog oscillators or DCOs, in place of the Polysix's VCOs. The Poly-61 also boasted double the patch memory, but did not feature its predecessor's onboard effects.
The ARP Little Brother, produced from 1975 to 1977, is a keyboardless monophonic expander module, sold as an add-on for another ARP synthesizer. It was controlled by connecting the control voltage (CV) output of an ARP synthesizer's keyboard to the Little Brother's CV input.
The ARP Quadra was a 61-key analog synthesizer produced by ARP Instruments, Inc. from 1978 to 1981. The machine combined pre-existing products: the Omni, Odyssey, a Solina-esque string synthesizer unit, a phaser and a divide-down organ with ADSR envelope, and a 4075 24 db low pass filter into one box. It has four sections. Bass is on the bottom two octaves, has two unison bass circuits, with AR and a single pole low pass filter and a related AD envelope for cutoff. A string section is similar to the ARP Omni. Poly Synth, and a two voice Lead Synth similar to the Odyssey and a five way mixer with four unit outputs, a stereo pair, a line mono and an XLR out.
Korg MS-10 is an analogue synthesizer created by Korg in 1978. Unlike its bigger brother, the Korg MS-20, the MS-10 only has one VCO, one VCF and one envelope generator. It is monophonic and has 32 keys.
The Yamaha CS30/CS30L is an analog keyboard synthesizer that was released in 1977. It is the top of the range in Yamaha's original line-up of monophonic synthesizers, others in the range being the CS5, CS10 and CS15. It features two voltage controlled oscillators (VCOs), two voltage controlled filters, two voltage controlled amplifiers (VCAs) and three envelope generators. It also sports a ring modulator and a voltage controlled low-frequency oscillator (LFO).
The Serge synthesizer is an analogue modular synthesizer system originally developed by Serge Tcherepnin, Rich Gold and Randy Cohen at CalArts in late 1972. The first 20 Serge systems were built in 1973 in Tcherepnin's home. Tcherepnin was a professor at CalArts at the time, and desired to create something like the exclusively expensive Buchla modular synthesizers "for the people that would be both inexpensive and powerful." After building prototypes, Tcherepnin went on to develop kits for students to affordably build their own modular synthesizer, production taking place unofficially on a second floor CalArts balcony. This led to Tcherepnin leaving CalArts in order to produce synths commercially, starting in 1974.
The Oberheim Xpander is an analog synthesizer launched by Oberheim in 1984 and discontinued in 1988. It is essentially a keyboardless, six-voice version of the Matrix-12. Utilizing Oberheim's Matrix Modulation technology, the Xpander combined analog audio generation with the flexibility of digital controls logic.
The Roland System-100M was a modular analog synthesizer manufactured by the Roland Corporation in the late 1970s and early 1980s. It was the successor of the Roland System-100, a semi-modular keyboard.
The Korg Mono/Poly (MP-4) is a 44 key "mono-polyphonic" analog synthesizer manufactured by Korg from 1981 to 1984. This keyboard is the sister synthesizer to the Korg Polysix. It has four highly stable voltage-controlled oscillators (VCOs), a 4-pole, self-oscillating low pass filter (LPF), wide modulation capabilities and pseudo-polyphony (paraphony).
The Steiner-Parker Synthacon is a monophonic analog synthesizer that was built between 1975 and 1979 by Steiner-Parker, a Salt Lake City-based synthesizer manufacturer. It was introduced as a competitor to other analog synthesizers, like the Minimoog and ARP Odyssey.
The AX60 is a polyphonic analogue keyboard synthesizer manufactured by Akai Professional in the mid-1980s. It was Akai's answer to the popular Roland Juno series synthesizers. The AX60 uses voltage-controlled analogue oscillators and filter circuitry based on the Curtis Electronics CEM 3394 integrated circuit.
The Roland System 700 was a professional monophonic modular synthesizer for electronic music manufactured by the Roland Corporation and released in 1976 and was followed by the Roland System-100M in 1978.
