hi ingo,
i agree about the steiner/parker filter.i guess it is
this filter with the different lp/hp/bp inputs.
bakis.


--- selfoscillate < synaptic_music@... > wrote:

> --- In Doepfer_a100@yahoogroups.com , Bakis Sirros
> <synth_freak_2000@y...> wrote:
> > dieter says:
> > "For the A-107 we have a new problem. Most of the
> > electronic parts for A-107 were sent on August 26,
> > 2003 to our manufacturer. But so far the parts did
> not
> > arrive. We applied for an investigation last week
> but
> > no results so far. If the consignment will not be
> > discovered the next few days we will have to order
> the
> > parts again from our suppliers. The consignment
> was
> > insured and so we will get the money back. Most of
> the
> > parts are standard (e.g. resistors, capacitors,
> > diodes) but some of the parts are manufactured
> > especially for us (e.g. front panel,
> potentiometers,
> > LED cover) or have a long delivery time (e.g. the
> quad
> > VCA used in the A-107). So I hope the consignment
> will
> > come up soon.
>
> oh a107, i want you so bad. please come to me. ;-)
>
> > The last few days we finished the development of
> these
> > new modules: A-172 Max/Min, A-133 VC Polarizer and
> > A-167 Comparator. We already ordered the front
> panels,
> > pc boards and electronic parts for these modules.
> I
> > hope they will be available end of September or
> early
> > October. The development of A-149-1 SOU1, A-137
> Wave
> > Multiplier and A-196 PLL is nearly finished too.
> All
> > modules work well but we still have to do some
> "fine
> > tuning": e.g. sensibility and range of the
> controls
> > and CV inputs of the A-137, VCO ranges and filter
> > control in the A-196, voltage range and
> quantization
> > of A-149-1 outputs. In the first A-149-1 design we
> > thought that it would be a good idea to quantize
> all
> > outputs to semitone steps. But after testing the
> > prototype we tend to keep this feature only for
> the
> > first two QRV outputs (2n states and n+1 states)
> as
> > one obtains here max. 64 states (n=6) and we think
> it
> > is a good idea to quantize these outputs to 1/12V
> (=
> > semitone quantizing). But for the SRV outputs we
> now
> > believe that the semitone quantization is not such
> a
> > good idea as it would limit the number of possible
> > states. If quantizing is desired even for the SRV
> > outputs one could use a A-156 quantizer module. In
> the
> > original Buchla module the QRV outputs were
> quantized
> > too (due to the circuit that adds 5 bits of a
> shift
> > register that works as a digital noise/random
> circuit
> > with different weight) - but not exactly to
> semitones
> > but an arbitrary grid. We think that it is good
> idea
> > to adjust the QRV outputs so that they correspond
> to
> > semitones when used in combination with a VCO.
> Even
> > the two SRV outputs of the Buchla module are some
> kind
> > of quantized but with 256 arbitrary grid steps due
> to
> > the 8 shift register bits that are added with
> > different weight.
> >
> > I suppose that the development of A-142-1, A-137
> and
> > A-196 will be finished within the next few days
> (or
> > 1-2 weeks) so that the modules could be available
> in
> > October/November.
>
> sounds good. a 2003 delivery would be great. those
> modules
> look neat under the christmas tree.
>
>
> > In the meantime we also found a manufacturer that
> > produces capsulated vactrols (i.e. LED/LDR
> > combinations). So I assume that the next new
> > developments may be vactrol modules if the new
> > vactrols are OK (we are waiting for samples).
> Maybe I
> > could revive a vactrol filter I have designed in
> the
> > seventies: a vactrol version of the Parker/Steiner
> > filter that was published in the magazine
> "Electronic
> > Design" in December 1974.
> > Best regards
> > Dieter Doepfer"
>
> cool, is this parker/steiner filter similar to the
> synthacon filter (with different inputs for
> hp,bp,lp)
> would be fantastic and a sure shot for many
> customers.
>
> best wishes
>
> ingo
>
>
>

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

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