Doepfer A-157- 1/2/3 Trigger Sequencer
A-157 is a trigger sequencer subsystem that is used to generate
up to eight trigger signals controlled by a 8x16 LED/button matrix
(some customers call it "Miniature Schaltwerk" as it is based on
the same matrix as the no longer available Schaltwerk).
The available system contains 3 modules:
- the LED/button matrix module A-157-1
- the trigger output module A-157-2
- one of the control modules A-157-3
The LED/button matrix module A-157-1 is the core of the
subsystem. It is used to set or reset the trigger event on each of
the 16 steps of each of the 8 rows.
The trigger output module A-157-2 outputs the 8 trigger signals and
has an LED display for each trigger. We will probably add a mute
button or mute switch for each row that allows to turn the trigger
output off/on independent for each row.
In the final version the modules A-157-1 and A-157-2 will be
probably merged into one module only because both modules are
essential for the subsystem.
The module A-157-1/2 (or the merged module that will contain
both units) can be connected to a simple control module or a more
sophisticated control module which is planned for the future
(similar to the A-155
and A-154 conceptual
design where the A-155 includes a simple control unit that can be
replaced by the A-154
which offers a lot of additional functions).
At the beginning a simple control module A-157-3 similar to the
A-155 control unit will be available. It offers only the functions
clock, start/stop and reset (both with manual controls and control
inputs). For this standard control unit the tempo (clock) is the
same for all 8 rows, the direction is forward and the length of
each row is 16.
We also plan a more complex control module A-157-4 that allows
additional functions like 128 memories for trigger sequences,
different clock/start/stop/reset for 2 or 4 groups of rows (e.g.
common for rows 1-4 and 5-8, or in pairs), independent first/last
step for each row, independent direction
(forward/backward/pendulum/random) for each row, one-shot mode, LC
display and so on. But these ideas are very preliminary and we will
have to find out which functions are essential.
There are also plans for a stand-alone version adapted to the
design of Dark
Energy and Dark
Time with the same case dimensions and wooden side panels
(provisional name "Dark Flow")
All features, specifications, prices and release date are
still without any obligation !