Monotimbral
Monotimbral (from the root prefix ''mono'' meaning one, and ''timbre'' meaning a specific tone of a sound independent of its pitch) is usually used in reference to electronic synthesizers which can produce a single timbre at a given pitch when pre ...
square
In Euclidean geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, π/2 radian angles, or right angles). It can also be defined as a rectangle with two equal-length adj ...
and sawtooth waveforms (not independently configurable).
, filter = 1 resonant 4 pole VCF
, attenuator =
ADSR envelope ADSR may refer to:
* ADSR envelope (attack decay sustain release), a common type of music envelope
* Accelerator-driven sub-critical reactor, a nuclear reactor using a particle accelerator to generate a fission reaction in a sub-critical assembly ...
, triggered by gate or LFO
, lfo = 1 LFO
, keyboard = 49-note
, left_control = Optional "stage set" Keytar grip that allows for pitch bend, program change and modulation
, ext_control =
MIDI
MIDI (; Musical Instrument Digital Interface) is a technical standard that describes a communications protocol, digital interface, and electrical connectors that connect a wide variety of electronic musical instruments, computers, and re ...
, memory = 2 track Polyphonic sequencer
, fx = Chorus
, dates = 1986-1990
, price =
The Siel DK70 is a
synthesizer
A synthesizer (also spelled synthesiser) is an electronic musical instrument that generates audio signals. Synthesizers typically create sounds by generating waveforms through methods including subtractive synthesis, additive synthesis and ...
Korg
, founded as Keio Electronic Laboratories, is a Japanese multinational corporation that manufactures electronic musical instruments, audio processors and guitar pedals, recording equipment, and electronic tuners. Under the Vox brand name, they ...
Poly-800, in that it operates like an analog synth, but its oscillators, LFO and envelope generators are all digital. Like the Poly-800, the DK-70 has eight oscillators/voices, but all the voices are mixed together through a single "monophonic" analog lowpass filter which was shared for all voices. Like a monophonic synthesizer, the filter was switchable between single or multiple modes. In single mode, the first key pressed triggers the filter envelope, and unless all keys are released, the filter does not re-trigger. In multi mode, each key pressed in turn triggers the filter envelope, even if other keys are still pressed down.
The oscillators are called " DCOs", and the envelope generated called a ''DEG'' (for Digital Envelope Generator). Digital components were much cheaper at the time and this allowed the DK70 to approximate the sound of an analog synth, but have 8 note polyphony without being cost prohibitive to the average user.
An unusual feature of the DK70 is that, while it appears to have the form factor of a standard synth, it has guitar strap pegs and can be used as a keytar. (The Poly-800 also had this feature.) An accessory called the "Stage Set" can be attached to the left side to provide a grip (similar to that of the
SH-101
The Roland SH-101 is an analog synthesizer manufactured by the Roland Corporation between 1982 and 1986. Though it was something of a commercial failure during the time of its manufacture, it later became a staple of electronic music in the 1990 ...
), where the player may manipulate a ribbon-style pitch bender, as well as have access to buttons that change patches, change
octave
In music, an octave ( la, octavus: eighth) or perfect octave (sometimes called the diapason) is the interval between one musical pitch and another with double its frequency. The octave relationship is a natural phenomenon that has been refer ...
s and engage the LFO
modulation.
It stores 50 patches, 10 of which are user assignable. A
cartridge
Cartridge may refer to:
Objects
* Cartridge (firearms), a type of modern ammunition
* ROM cartridge, a removable component in an electronic device
* Cartridge (respirator), a type of filter used in respirators
Other uses
* Cartridge (surname), a ...
port accepted a cartridge which could store an additional 50 patches. All programming is done via pushbuttons, somewhat limiting its "tweakability" for live performances.
It also has an onboard two-track
sequencer
Sequencer may refer to:
Technology
* Drum sequencer (controller), an electromechanical system for controlling a sequence of events automatically
* DNA sequencer, a machine used to automatically produce a sequence readout from a biological DNA sam ...
, which can be programmed by
setting the tempo and recording a performance (unlike a step sequencer, where notes were entered in sequential order and played back at fixed durations). The performance would then loop when played back.
The synth engine was also available as a keyboardless, rack-mount or table top version called the Expander-80, similar to the Korg EX-800.
Released in Brazil as Giannini GS 7010 polyphonic synthesizer