DOEPFER Quad AD/LFO A-143-1 Handbuch - Seite 3

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System A-100

Quad AD/LFO A-143-1

DOEPFER

Provided that the trigger inputs are not patched the four

units are daisy chained via the comparator outputs (Cp Out)

as they are normalled via the switching contacts of the

trigger input sockets, i.e. each unit is triggered by the Cp

output of the preceding unit. Fig. 4 shows both the

behaviour of the module in the default state (complex/multi-

state LFO) and with a trigger signal applied to trigger input 1

(complex envelope generator).

The rising edge of Cp1 triggers the unit 2, the rising edge of

Cp2 triggers the unit 3 and so on. The example uses

different Attack, Decay and Threshold settings for each unit.

At the bottom of the picture two possible mixes are shown:

For the first mix all envelope signals are added up with the

same level and polarity (+1), i.e. all polarizer controls are in

the fully clockwise position. For the second mix the

level/polarity is +1 for the units 1 and 4, and –1 for the units

2 and 3, i.e. the polarizer controls of unit 1 and 4 are fully

clockwise and the polarizer controls of unit 2 and 3 are fully

counter-clockwise.

The dashed lines at the right end of the mix graphs are valid

if the module is in the cyclic mode, i.e. if the comparator

output 4 is normalled to the trigger input 1 (i.e. default

without external trigger signal). The permanent lines are

valid if an external trigger signal is used to trigger unit 1 (i.e.

the daisy chain is interrupted at trigger input 1).

Fig. 4: Complex envelope generator / LFO