Doepfer A-105 manual

Doepfer A-105
7.5 · 1
PDF manual
 · 8 pages
English
manualDoepfer A-105

doepfer

System A - 100 A-105 / A-122

1

1. Introduction

The modules A-105 and A-122 are voltage-
controlled low-pass filters, which filter out the higher
parts of the sound spectrum, and lets lower frequen-
cies pass through.
The
cut-off frequency
determines the point at which
filtering takes effect. You can control this manually, or
by voltage control (
filter modulation
, for instance by
an LFO). Two CV inputs are available. The cut-off
slope is
-24 dB/octave
.
Voltage controlled resonance: for both A-105 and
A-122, resonance can be controlled not just manually,
but by voltages as well, right up to self-oscillation. In
this case, the filter behaves like a sine wave oscillator.
The A-105 is based on the special circuit SSM2044,
that was used in several devices of the companies
Korg (Polysix, Mono-Poly), Sequential Circuits
(Prophets, Pro-One), PPG, Fairlight, Emu and Kawai.
The circuitry of the A-122 uses a Curtis CEM 3320
chip, and is very similar to the classic Oberheim filter
sound
. Because of the different circuits the A-105 and
A-122 have considerably different sounds and even
sound different compared to the other filters (e.g.
A-120 Moog-type low pass, A-102 Diode Low Pass or
A-103 18dB low pass, A-124 Wasp filter).
As the functions and controls are the same for both
modules they are a combined in one manual.
FCV 1
Resonance
FCV 2
QCV
Audio
In
Level
Audio
Out
QCV
Frequency

A-122

VCF 3

FCV 2

Manual

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Doepfer A-105 specifications

Below you will find the product specifications and the manual specifications of the Doepfer A-105.

General
Brand Doepfer
Model A-105
Product Not categorized
Language English
Filetype User manual (PDF)

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