> ----- Original Message -----
> From: Dieter Doepfer
> To: bakis sirros
> Sent: Wednesday, December 18, 2002 1:30 PM
> Subject: AW: about the a130,a131,a132
>
>
>
> The reason for the differences of the AC/DC
> processing are the integrated circuits used in the
> different VCAs (e.g. the Curtis/CEM chips CEM3381
> and CEM3382 cannot be used for DC signals):
>
> A-130 and A-131 (old production series with
> CEM3381/CEM3382): no DC processing possible
> A-130 and A-132 (new production series with CA3080):
> DC processing possible
> A-132: DC processing possible
> A-134: no DC processing possible (CEM3381 used)
> A-135: no DC processing possible (CEM3381 used)
> A-136: DC processing depends upon the jumper setting
> of JP2. JP2 is close to the first potentiometer. If
> installed: DC processing possible (is short-circuit
> of the AC coupling capacitor)
> A-138a/b: DC processing possible
> A-116: no DC processing possible (AC coupling
> capacitors in both input and output circuit, if both
> are shortened DC processing should work)
> A-129-3: DC processing possible
>
>
> Latest news: A-154 prototype is working now. But we
> are not sure for some features:
> a.. Should the internal clock generator stop in
> stop mode or continue clock generation in stop mode
> The advantage is continuos clock is that one could
> adjust the clock speed in advance (LED display of
> clock). The advantage of stopping clock is that the
> clock would exactly in sync when start is triggered
> b.. Should the one shot modes even be possible for
> random and CV adressed mode and if applicable how it
> should work (e.g. for random: random steps until the
> last step is adressed, then it stops, the number of
> steps that occur in one shot random mode cannot be
> predicted, same for CV adressed mode, i.e. CV
> adressing as normal until last step is adressed,
> then it stops)
> Because many customers suggested this: we will
> probably develop another low pass filter based on
> SSM2044 (used e.g. in Polysix and other Korgs, PPG,
> Siel and so on). For all "complaints" about this
> additional filter: customers want to have this
> filter, it's not our idea. One customer even agreed
> to purchase 100 SSM2044 or more in advance for us if
> we promise that we will offer a SSM2044 filter.
>
> We will built a prototype of the recommended CV
> input expander (5 input sockets with attenuators
> that can be used to expand the number in CV inputs
> e.g. for filter frequency, via jumpers the 5 inputs
> can be combined in different ways, e.g. 3 + 2 or 1 +
> 4 or all 5 together). The inquiries/advance orders
> for this CV input expander will decide if this
> module will go into production. Suggested module
> number: A-137 (as it is nearly the same as the A-138
> but without the active amplifiers of the A-138, so
> the price will be nearly the same as for the A-138).
>
> Kind regards
> Dieter Doepfer
> Doepfer Musikelektronik GmbH
> http://www.doepfer.de
> email: hardware@...
>
> Because of Christmas holidays and stock keeping our
> company is closed from December 20, 2002 until
> January 06, 2003.

=====
synthfreak(parallel worlds)
athens-greece
1 group owner-moderator

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