Doepfer A-143-1 Manual

Doepfer Ikke kategoriseret A-143-1

Læs gratis den danske manual til Doepfer A-143-1 (8 sider) i kategorien Ikke kategoriseret. Denne vejledning er vurderet som hjælpsom af 18 personer og har en gennemsnitlig bedømmelse på 4.8 stjerner ud af 9.5 anmeldelser. Har du et spørgsmål om Doepfer A-143-1, eller vil du spørge andre brugere om produktet?

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DOEPFERDOEPFERDOEPFERDOEPFER System A-100 Quad AD/LFO A-143-1
1
Fig. 1: A-143-1 Controls, Inputs and Outputs
1. Introduction
Module A-143-1 contains four independent Attack/Decay
generators. When the module is used as a complex
envelope generator, then two, three or four units are daisy-
chained, i.e. the preceding unit triggers the following unit.
But the four units can be used even as four separate AD
generators (mode switch in position AD) or free-running AD-
type LFOs (mode switch in position LFO). The LFO mode
differs in several points from a regular LFO (e.g. A-145, A-
146 or A-147), as the slopes are exponential - in contrast to
linear slopes of a normal LFO. In addition the frequency is
defined by both controls, as the attack control defines the
duration of the rising slope, while the decay control defines
the duration of the falling slope.
Each unit has available a comparator that compares the AD
output voltage against a manually adjustable threshold and
turns on the corresponding comparator output as soon as
the AD output voltage goes below the threshold level during
the decay phase. The comparator outputs are normalled to
the trigger inputs of the following stage via the switching
contacts of the trigger input sockets. Consequently the first
unit triggers the second, the second triggers the third and so
on (and the last unit triggers the first one).
Each AD/LFO unit also offers a polarizer control. This allows
adding or subtracting all AD/LFO signals to the mix output
with adjustable level. Additionally each unit features a single
envelope output and a digital “End Of Attack (EOA)” output,
that indicates the end of the attack phase.
Quad AD/LFO A-143-1 System A-100 DOEPFERDOEPFERDOEPFERDOEPFER
2
2. Basic Principles
Fig. 2 shows the basic function of each unit:
Fig. 2: Basic function
The positive edge of the trigger input starts the envelope
signal and resets the “End of Attack (EOA)” output. The time
for the rising slope of the envelope is defined by the Attack
control. As soon as the maximum value (about +8 V) is
reached, the EOA output is set to “high” and the decay state
begins. The time for the falling slope of the envelope is
defined by the Decay Control.
The threshold setting defines the behaviour of the
Comparator output (Cp Out). This output turns “low” as soon
as the level of the envelope signal exceeds the threshold
level. Otherwise it’s high.
Both digital outputs EOA and Cp Out can be used to trigger
other A-100 modules or other units of the A-143-1.
The retrigger behaviour of the A-143-1 is different compared
to other envelope generators. During the rising slope of the
envelope (attack phase) the envelope cannot be retriggered
or reset. And during the falling slope (decay phase) the
direction changes if a trigger signal appears (changes from
decay to attack state).
Fig. 3: Retrigger behaviour

Produkt Specifikationer

Mærke: Doepfer
Kategori: Ikke kategoriseret
Model: A-143-1

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