dieter says:
"We (actually Christian Assall) looked at the A-149-1
concerning Peter's comments. Christian modified the
module so that the rising edge triggers the random
voltages as described in the manual. We could not
duplicate that the A-149-1 triggers on both the rising
and falling edge of the trigger signal. Christian also
separated the upper and lower section of the module so
that 2 independent shift registers are used now. Even
though there is no significant difference from our
point of view we carried out the modification as it
was not a big problem. Of course the random behaviour
is somehow different for both versions but one could
not really say what is the difference. In the first
case one common shift register is used and the advance
to the next random state is triggered by both trigger
inputs. But the random CV outputs are updated only for
the module section from which the trigger comes. In
the second case a separate shift register is used for
each module section and the shift register advances to
the next state if the corresponding trigger occurs.
The outputs voltages are random in both cases but
somehow different if you compare both versions. But it
is impossible to find out if one version is "more" or
"better" random than the other one. But to emulate the
behaviour of the original Buchla module it is true
that 2 separate shift registers are the right
solution.

Christian is also about to put the finishing touches
to the A-154 and he/we are not sure in some details.
If it comes to the details it is not so easy to decide
how the module should work. E.g. which pendulum type
he should offer Should the first/last step played
twice or only once (MAQ users will know the
difference). In the first case the rhythmical
structure remains the same by changing the running
mode but the first resp. last step is played twice. In
the second pendulum mode the first/last step is only
played once.
And: should the CV addressed mode be triggered by the
clock or be completely independent of the clock We
tend to the clock triggered version. To obtain a
apparently clock independent operation one has simply
to increase the clock tempo (e.g. 100Hz).
Another "problem": What if first step CV is higher
than last step CV Should the running mode be
inverted (in case that backward mode is selected the
sequence would run forward in this case) Or the step
be fixed e.g. at the first step CV if first step CV is
higher than last step CV

A lot of questions, I know. I think we will simply
make the decision what happens under these unusual
conditions. If desired we could offer an update later
if it turns out later that another solution would be
better.

Other news:
We plan a distance-to-CV module that is based on
infrared triangulation (distance range about 20cm ...
1,5m).

And at the first time we think about the cancellation
of some modules due to the poor sales of some modules.
We will probably not manufacture the following module
after the stocks are sold out: A-139 Headphone
amplifier, A-177 foot controller, A-191 Shepard
generator/MIDI-CV, and the separate +5V power supply
A-100NT5 (not the 5V adapter, this will be continued
!). At the moment there are still sufficient modules
in stock so that we will be able to offer these
modules at least during the next 6...12 months (based
on the sales of the last 2 years for these modules).
We also think about a smaller stand alone case made of
1mm steel to be able to with integrated miniature PSU
to enable customers to run only a few modules
(especially for sound processing). Many customers ask
if it would be possible e.g. to run only some filters
(especially A-107, A-108, A-124) or other modules.
Probably not very interesting for most of the group
members but we have to think about customers too who
want to take advantage of one or a few A-100 modules
only."









=====
Bakis Siros
Parallel Worlds / Polariton
Athens-Greece
1 group owner
http://www.rubber.gr
http://www.ward12.com

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