DOEPFER A-100CGK User Manual - Page 6

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A-100 Connector

This 9 pin sub-D connector can be used to establish the connection between the A-

100CGK and an A-100 system with one cable only by means of the planned A-

100CGK adapter module. The connector carries the signals Gate, CV1, CV2, CV3

and midi out. In addition the A-100CGK is powered by the power supply of the A-100

system if the adapter board is used. The power supply connector

used.

Gate

This 3,5 mm jack socket is the gate output of the A-100CGK. According to the

chosen gate polarity (positive or negative) and gate voltage (+5V, power supply

voltage or S-Trig) the corresponding gate signal is available at this socket.

Usually this socket is connected to the gate input(s) of the envelope generator(s),

e.g. ADSR's A-140, A-141 or A-143-2. If more than one envelope generator has to be

triggered a multiple (A-180) or bus access module (A-185-1) can be used. For details

please refer to the user manual of the corresponding module.

The gate output can be used for other applications too: e.g. advance to the next step

of an analog (A-155) or gate/trigger sequencer (A-160/161) or sequential switch (A-

151, A-152), controlling a voltage controlled switch (A-150), triggering a sampler

module (A-112), resetting an LFO (A-145) and many more. In general the gate output

can be used to control any gate or trigger input of an A-100 module.

In addition the gate output can be processed e.g. by a slew limiter (A-170, A-171) to

obtain a slowly increasing or decreasing control voltage that can be used to control

other modules, e.g. the frequency of a VCLFO (A-147), or the amplification of a VCA

(A-130/131/132) to obtain increasing/decreasing levels (audio or CV, e.g. LFO depth

for frequency modulation). Even the usage of the gate signal as a CV input can be

useful (e.g. switching between two different frequencies of a VCLFO A-147).

CV1

This 3,5 mm jack socket is the control voltage output of the A-100CGK that is

controlled by the number of the key pressed on the keyboard. The voltage range is

0...+5V, the scale is 1V/octave. Inside the device there is a trimming potentiometer

that can be used to re-adjust the scale if necessary. As the case has to be opened

for this the procedure should be carried out by a specialized company only.

Usually this socket is connected to the 1V/oct CV input(s) of the voltage controlled

oscillator(s) (VCO's), e.g. A-110 or A-111-1/2. Even CV input of the sampler module

A-112 can be controlled to play a recorded sample with the keyboard. If the filter

used in the patch should follow the VCO frequency (called keyboard tracking) the

CV1 has to be connected to the filter module too.

If more than one VCO/VCF has to be controlled a multiple (A-180) can be used for

signal distribution. If more than two VCO/VCFs have to be connected to the CV1

output of the A-100CGK a bus access module (A-185-1) or precision adder module

(A-185-2) is recommended instead of a simple multiple to avoid signal losses that

may cause scale or tuning problems. For details please refer to the user manual of

the corresponding module.

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