Doepfer A-108 Handleiding

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doepfer System A - 1006/12/24/48 dB Low Pass A-108

1

1. Introduction

Module A-108 is a completely new, unique voltage-

controlled low pass/band pass filter based on the

well-known transistor ladder (Moog ladder).

The module has internally an 8 stage low pass filter

with different slopes available: 6, 12, 18, 24, 30, 36, 42

and 48 dB per octave. In the factory the outputs with 6,

12, 24 and 48 dBare connected to the four low pass

sockets at the front panel. In addition it features an

band passoutput (i.e. band pass with transistor lad-

der).

The module has manual controlsfor frequencyand

resonanceavailable. Resonance can be adjusted

right up to self-oscillation, in which case the filter will

behave like a sine wave oscillator. Three CV inputs

for frequency control are available. Twoof them are

eqipped with attenuators.

The A-108 features an external feedback inputthat

enables the insertion of additional modulesinto the

feedback path.

The audio input is very sensitiveso that distortion

is possible even with normal A-100 levels.

Audio

In

CV 2

CV 2

Feedb.

CV 3

CV 3

Res.

CV 1

Freq.

Audio Level

6dB

LP

12dB

LP

24dB

LP

48dB

LP

BP

A-108

VCF 8

Product specificaties