Doepfer

--- 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