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- Order number: 120088
- Depth: 90
A sound source for generating subharmonic minor-chords like in the Trautonium. It contains four parallel frequency dividers with factor 1-24, which derive fixed partial frequencies - the so called subharmonics - out of the frequency of an external master VCO. The module has 50 memory banks each for 4 mixtures, i.e. mixes of partial frequencies.
The term subharmonics was introduced by Oskar Sala in connection with his so-called Mixtur-Trautonium. A subharmonic means in this context a sawtooth wave (German: Kippschwinger) whose frequency is derived from a master frequency and the master frequency is an integer multiple in the range of 1 to 24 of the subharmonic - in other words: the master frequency is divided by an integer 1 to 24 to obtain the subharmonic.
Pay attention that the output waveform of a subharmonic is sawtooth (as also used in the original Trautonium) and not sine. The term subharmonics is somewhat misleading. The master frequency comes e.g. from an oscillator to the frequency input of the A-113. The frequency dividers of the 4 subharmonics is adjusted with up/down buttons as displayed with 2 character LED displays. The subharmonics are available as single outputs and as mix output with adjustable levels for the subharmonics.
Two gate type control inputs enable to select between 4 different mixtures, i.e. 4 different settings of the frequency dividers. In the original Trautonium these are controlled by foot switches to switch between 3 mixtures while playing (the original Trautonium has only 3 mixtures available but with the 2 gate inputs of the A-113 four different settings can be adressed).
Additionally the A-113 features a mixture memory with 50 presets. Each preset consists of 4 mixtures that can be selected with the gate inputs, each mixture contains the values of the 4 frequency dividers.
|Power consumption +12V:||120|
A-113 auf Doepfers Seite;http://www.doepfer.de/a113.htm; Anleitung (pdf);http://www.doepfer.de/a100_man/a113_anl.pdf; mehr Info zu Doepfers Trautonium-Projekt;http://www.doepfer.de/traut/traut_d.htm
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.