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Doepfer A-113 Subharmonic Generator

Module A-113 is a new sound source that derives from an incoming pulse signal four so-called subharmonics (German: Subharmonische). 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...24 of the subharmonic - in other words: the master frequency is divided by an integer 1...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 A-110 or A-111 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.
More detailed information about the Trautonium can be found on our internet site in the Trautonium project article. These additional Trautonium modules are available: Trautonium Manual A-198, Trautonium Filter A-104.

Inputs : master frequency (rectangle/pulse input), foot contr. 1 + 2 (gate 1+2)
Outputs: 4 single outputs, 1 mixture output

For more detailed information please look at the English user's manual 

Breite/Width: 26TE / 26HP / 131.8 mm
Tiefe/Depth: 90 mm (gemessen ab der Rückseite der Frontplatte / measured from the rear side of the front panel)
  • alte Version (16-poliges Busverbindungskabel) / old version (16 pin bus connection cable) :
    • + 30mA (+12V), -10mA (-12V) + 100mA@+5V
  • neue Version (10-poliges Busverbindungskabel) / new version (10 pin bus connection cable):
    • +120 mA (+12V), -10 mA (-12), (keine zusätzlichen +5V erforderlich / no additional +5V required)

ACHTUNG! Ältere Versionen des Moduls A-113 benötigen eine zusätzliche +5V-Stromversorgung mit 100mA (z.B. eigenes +5V-Netzteil oder +5V-Adapter)
Für alle ab Frühjahr 2015 ausgelieferten Module ist die 5V-Stromversorgung nicht mehr erforderlich, da diese einen eigenen 5V-Regler (7805) auf dem Modul besitzen

Die beiden Versionen können an Hand des Busverbindungskabels unterschieden werden: alte Version = 16-polig, neue Version = 10-polig

ATTENTION ! Older versions of the A-113 module require an additional +5V power supply with 100mA (e.g. the separate +5V power supply or the +5V low-cost adapter)
All modules shipped from spring 2015 no longer require the additional +5V supply as these modules have an 5V voltage regulator (7805) on board

The two versions can be distinguished by means of the bus connection cable: old version = 16 wires, new version = 10 wires.

Trautonium-Klangbeispiele unseres Kunden Felix Foerster / Trautonium sound examples by our customer Felix Foerster: