Doepfer

Hi Evan,
I don't know how to fix the module but here's a simple patch to 
solve it.

Wasp filter(a124) to Dual VCA(a132) audio in.
Control Voltage Source(a176) CV1 to Multiples.
multiples 1 out to Voltage Invertor(a175)
Voltage Invertor to Wasp filter CV1
multiples 2 out to Dual VCA CV input.

As you sweep the CV source knob (CV1) the hi pass will sweep up and 
the volume of the VCA will get quieter until silent.


John.






--- In Doepfer_a100@y..., "Evan Lorden" <funkfumes@h...> wrote:
> Hi Doepfer interestees,
> Thanks for those lists.  Quite handy.
> 
> I have a WASP query.
> I'm hoping someone can tell me how to calibrate the cutoff 
frequency so that 
> I can cut the sound out completely using the high pass filter.
> I hope that's a clear request.
> When I use the low pass setting, I can cut the sound out so that 
nothing 
> gets through, but when I use the high pass setting (or the band 
pass, for 
> that matter) the freq control knob ceases to have effect for the 
top quarter 
> turn, and there is quite a lot of the frequency range left 
unfiltered.  ie. 
> All the top range is unfilterable.
> 
> I unscrewed the unit from the frame and twiddled the two trim pots 
on the 
> circuit, which seem to be designed for the purpose of calibrating 
the cutoff 
> in some way, but neither bring the high end cutoff range up.
> 
> Do other people's WASP filters work the same way?
> I find it quite unsatisfactory, in a way.
> 
> It seems to me it may simply be a fault of the circuit, though, 
rather than 
> poor calibration.  If so, can anybody tell me if there is a 
component or two 
> that I can replace to extend the range?
> 
> Thanks!
> Evan On Earth,
> Melbourne, Australia.
> 
> 
> ------
> Message: 2
>     Date: Mon, 23 Sep 2002 20:46:09 -0000
>     From: "Joe Buechler" <buechlerjoe@t...>
> Subject: Re: voltage range of all the a100 CV cources???
> 
> According to my cheapo voltmeter (which has an analog dial hehe):
> 
> A165: 0 to 9V
> A160: 0 to 10V
> A147 -4.5 to +4.5V
> A155 Gate: 0 to 10V
> A155 CV top: 0 to 4V
> A155 CV bottom: 0 to 7V
> A190 Gate: 0 to 9V
> A191 LFO: -5 to +5V
> A191 CV: 0 to 5V
> A141: 0 to 6V
> A162: 0 to 10V
> A140: 0 to 7V
> A119 Gate: 0 to 8V
> A119 Env: 0 to 8.5V
> A176: 0 to 5.5V
> A145: -5 to +5V
> 
> I seem to recall Timothy did a more comprehensive list earlier when
> the A150 bleed-thru issue was being discussed.
> 
> Joe (not a wizard)
> A110 sine, pulse +/- 5.5V(there's no coupling capacitor, so stays
> this no matter what pulse width set to), tri +/- 7V, saw +/-5V
> A111 pulse +/- 4.5V (output is AC coupled, so this shifts to make 
DC
> level zero, depending on pulse width), saw, tri +/- 3V, sine +/- 
4.5V
> A117 digital noise 0 E12V, oscillator outputs (very) approx +/- 5V
> A119 gate out 0 E9V
> A129/3 CV out (nothing in) 0 E5.5V (daisy-chaining two sections 
can
> add the same to this, to get up to 11V out)
> A140 envelope 0 E7V
> A141 envelope 0 E6V
> A145 saw, sine, square +/- 4.5V, triangle +/- 5V
> A146 bipolar pulse +/- 4.5V, unipolar pulse 0 E8V, variable tri 
+/-
> 4V
> A147 tri +/- 6V, sine +/- 5.5V, square +/- 5V, saw (unipolar) 0 E
7V
> A156 trigger out 0 E5V
> A160/161 clock outputs 0 E12V
> A163 divided output +/- 2.5V; (DC output if capacitor shorted 0 E
5V)
> A174: X/Y offset set to 0, full range of joystick gives approx  -4V
> to +4V; joystick central, turning X or Y offset gives approx the
> same, -4V to 4V (hence you can get 0 E8V out etc.)
> A179 gate 0 E9V, CV out swings through 12V, so -12V E0 to 0 E12V
> possible depending on offset setting
> A190 gate 0 E9V
> 
> Some of these readings are quite rough and ready, and there may
> obviously be some variation from module to module; also some 
VCO/LFO
> outputs change with frequency.
> 
> Maybe other members can supply ranges for those modules I don't 
have,
> e.g. A176 etc.
> 
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