DOEPFER A-155 Manual - Page 4

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A-155

Analog / Trigger Sequencer

3. Controls

1 Switches

The three-position toggle switches 1 are used to

select whether a particular step outputs a trigger signal

on its respective row.

Position of the upper switches:

• up: trigger output on row 1 (Trig 1 output)

• centre:

no trigger output

• down:

trigger output on row 2 (Trig 2 output)

Position of the lower switches:

• up: trigger output on row 3 (Trig 3 output)

• centre:

no trigger output

• down:

gate output on row 4 (Gate output)

The three upper rows produce triggers - each step that

is switched to a row will produce a short pulse like a

clock signal. The lowest row produces gates - the

signal remains "high" for the duration of the step (see

fig. 1 on the next page).

2 LEDs

The eight LEDs 2 show the sequence's progress;

each LED lights when its respective step is active.

System A - 100

Trig. 1

Trig. 2

Trig. 3

Gate

Clock

Trig. 1

Gate

fig. 1: timing diagram for trigger and gate rows

3 Trig. Control

The four LEDs 3 are status indicators for the trigger

and gate rows. Each lights when a step is reached

which is switched to its own row.

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