The VCS 3 has three oscillators (the first two normal
voltage-controlled oscillators; the third a
low-frequency oscillator), a
noise generator, two input amplifiers, a
ring modulator, 24 dB/octave low-pass
voltage-controlled filter, a trapezoid
envelope generator, a joystick controller, a voltage-controlled
spring reverb unit, and two voltage controlled output amplifiers. Unlike most
modular synthesiser systems, which used cables to link components, the VCS 3 uses a distinctive patchboard matrix where pins are inserted to connect its components.
Keyboards controller Although the VCS 3 is often used for generating
sound effects due to lack of a built-in
keyboard, external keyboard controllers were available for melodic play. The
DK1, produced in 1969, is an early velocity-sensitive monophonic keyboard for VCS 3 with an extra
VCO and
VCA. In 1972 it was extended for
duophonic play as
DK2. Also in 1972, the
Synthi AKS was released, as well as a digital
sequencer with a
touch-sensitive flat keyboard, the
KS sequencer, and its mechanical keyboard version,
DKS. Related models The VCS 3's basic design was reused by EMS in many other of their own products, most notably the
EMS Synthi 100 (1971), the
Synthi A (1971), and
AKS (1972, essentially a VCS 3 in a plastic briefcase). The AKS also has a
sequencer built into the keyboard's lid. A former agent of EMS in the United States, Ionic Industries, released a portable-keyboard VCS 3 clone in 1973. The
Ionic Performer, whose circuitry is based on the VCS 3's, replaced the patchboard matrix with over 100 push-buttons, and added a built-in keyboard and
effects units. File:EMS A.jpg|
EMS Synthi A (1971), also called
Portabella Along with
Klaus Schulze and
Tangerine Dream, other frequent users of the instrument include
Cabaret Voltaire,
Tim Blake &
Miquette Giraudy of
Gong,
Richard Pinhas of
Heldon,
Merzbow,
Thomas Lehn,
Cor Fuhler and
Alva Noto. ==Development==