Doepfer A-198 Handleiding

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doepfer System A - 100Trautonium / Ribbon ControllerA-198

1

1. Introduction

Module resp. A-198 is a so-called Trautonium Rib-

bon Controller. It provides variable Control Voltages

and Gate signals generated by combined position /

pressure sensor. The controlling element of the A-

198 is a linear position sensor(length about 50 cm)

that has available a pressure sensor too.

Touching the sensorwith a finger generates a Con-

trol Voltagethat is proportional to the position of

the finger.The Scale - i.e. the relation between

position difference and voltage difference - is ad-

justable with a potentiometer at the front panel. A

Holdswitch is used to determine if the CV voltage is

held after removing the finger or if the voltage jumps to

0V. In the last case (Hold = off) a Gatesignal is

derived from the CV voltage whenever a finger tou-

ches the sensor (e.g. for triggering an Envelope Gene-

rator / ADSR).

A pressure sensormade of conductive rubber arran-

ged below the position sensor generates a second

Control Voltagethat increases with higher pressure

of the finger. Even for this CV the Scaleis adjustable.

A second Gatesignal is triggered as soon as the

pressure exceeds a certain value. The Gate Thres-

hold is adjustable at the front panel.

A-198

Trautonium / Ribbon Ctr.

Scale

CV

Gate

Position

Scale

CV

Gate

Pressure

Control

Board

Off

OnHold

Thres

Product specificaties