DOEPFER A-154 Podręcznik - Strona 8
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Sequencer Controller
Another example is to control the clock rate by one of
the A-155 CV outputs. This leads to a different time
length (or different tempo) for each step, i.e. the tempo
is different for each step. If the A-155 Gate output is
used to control the clock rate skipping is possible as
beyond a certain control voltage the step time becomes
extremely short (less than a millisecond) and the corre-
sponding step is practically leaved out.
Beyond it the parameters of the clock generator can be
controlled by other voltages too: e.g. LFO, Random CV,
Theremin, ribbon or foot controller, distance or light
controlled CV and many more.
The required control voltage at the sockets $ resp. % to
cover the complete rate resp. PW range is about 0...+5V
(with attenuators 4b resp. 5b at it's maximum and
Manual Clock 4a resp. Manual PW 5a at it's minimum
position). Beyond about +4.8V at socket $ skipping
occurs (see above).
9 Clock (LED) / ) Clock Out (2 x socket)
The two sockets ) are the output of the internal clock
oscillator (miniature multiple). The internal clock signal is
normalled to socket &d Ext.Clock, i.e. the internal clock
is used as clock source provided that no plug is inserted
into socket &d. LED 9 is the clock display. Pay attention
that for high clock rates (~ above 20 Hz) the human eye
will not be able to follow the LED display and the LED
seems to be permanently on (with dimmed brightness).
8
System A - 100
6a Manual Start (button) / &a Ext. Start (socket)
6b Manual Stop (button) / &b Ext. Stop (socket)
6c Manual Reset (button) / &c Ext. Reset (socket)
6d Manual Clock (button) / &d Ext. Clock (socket)
These 4 buttons and sockets have nearly the functions
as those of the "old" A-155 control unit (refer to A-155
manual for details):
• 6a Manual Start: starts the sequence
• 6b Manual Stop: stops at the current position
• 6c Manual Reset: resets to first step
• 6d Manual Clock: advance to next step
• &a Ext. Start:
• &b Ext. Stop:
• &c Ext. Reset:
• &d Ext. Clock:
Socket &d Ext.Clock is normalled to the internal clock
generator.
If the sequencer does not run though a clock signal is
applied probably the stop mode is selected. In this case
the start button has to be operated to start the sequence.
Operating the stop button causes the sequencer to stop
at its current position. But no reset to first step is carried
out!
doepfer
positive transition starts sequence
positive transition stops sequence
positive transition prepares jump
to first step (see below)
positive transition triggers
advance to next step