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- Order number: 120132
- Depth: 60
The A-143-4 contains four voltage controlled LFOs / VCOs with triangle and rectangle outputs in one single module.
Each sub unit has a potentiometer and two CV inputs for controlling the frequency and ouptuts triangle and square wave forms.
Beyond this there´s a common reset/direction input for units 1-3 and separate reset and direction inuts at unit four. Direction determines in which direction the LFO will oscillate after having received a reset, either upwards or downwards. When no cable is plugged int the direction jack, the reset is normalized to it.
The frequency range can be switched between low and high, thus it can produce frequencies up to 15kHz. Each unit can be used as a VCO as well, wlthough the tracing is not exactly 1V/octave. The LFOs/VCOs are temperature compensated and after a heating time of 10 miutes they run stable, independent of the outside tepmerature.
In addition there´s a common section for all four LFOs: it contains CV inputs and potentiometers for simultaneous frequency control of the LFOs and outputs carrying mixtures of the triangle and the rectangle outputs.
Bicolor LEDs diyplay the phase of the traingle (orange = positive / red = negative). A number of jumpers on the back side set different frequency ranges, they de-/activate frequency control via the internal CV buss or set the control range of the frequency potantiometers (either 1 or 5 octaves).
WIth a long trajectory building synths, MIDI keyboards and designing bespoke devices for music pioneers Kraftwerk, Dieter Doepfer decided to design his own modular synthesizer in 1995 based on existing electrical and mechanical specifications of lab equipment he used during his years at university. The official presentation of the system at 1996 Frankfurt Musikmesse caught everyone by surprise and created lots of interest. After Doepfer published the specifications on his website, many instrument designers and engineers saw the potential of the new Eurorack format. Doepfer continues expanding their catalog of over 200 modules (and counting), operating from their modest offices in the outskirts of Munich.