Doepfer

..... Please take note that my approach of regulating is not the only way and so is my explaination ;-)
Hope you got the idea 



Verstuurd vanaf mijn iPhone SE Lunatik 

> Op 19 aug. 2016 om 18:22 heeft Jacco Ville jaccoville@yahoo.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> het volgende geschreven:
> 
> I noticed some different behaviour of my A156's when testing my setup. 
> With a tuner on an A110 tuning from the A155 from C to C (seq knob fully ccw and cw) some came to C or B and when switching between 1V 2V and 4V it was not consistent. 
> So.... Time to make voltages visible. 
> Yesterday I finished fine tuning my four A156's and five A155's. 
> Once you know the drill it's not difficult, all it takes is some time and a precision voltage and measurement.
> I used the A185-2 as a voltage source 
> and a Jones O'Tool Plus oscilloscope with a dual screen for voltage measurement in mV. 
> One input as source, the other from the A156.
> As Dieter said, watch the offset. 
> Switch your precision adder between 0V and 4V. 
> I noticed there was a different quantizing sometimes (after regulating the P4 first!) when switching between 1V and 4V. 
> Then it made one step (note) to far (up). Then the P1 (cv1) or P2(cv2) comes in handy to regulate the threshold of the quantizer. 
> It acts as an attenuator, you can set quantizer steps earlier or later. 
> I made a list with calculated steps from 0,0833 to 1.000V and so it's easy to check where the threshold is for every step. 
> 
> I used the attenuator from the 185-2 to walk through those steps and regulated that quantizing takes place at about 0,015V before the next step (note voltage) which leaves enough room for "minus offset" sequencer voltages. 
> 
> Cheers 
> Good luck
> 
> Jacco Ville
> 
> 
> Verstuurd vanaf mijn iPhone SE Lunatik 
> 
>> Op 19 aug. 2016 om 16:59 heeft Nicholas Keller maq163x2@gmail.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> het volgende geschreven:
>> 
>>  
>> I hadn't thought to check the 156 for adjustment.  I've been struggling with tuning for some time now and almost always have a 156 in the patch.  Thanks for bringing this to my attention.   I'll check the scale of my 155 while I'm at it!
>> 
>> 
>> 
>> 
>> 
>> 
>>> On Thursday, August 18, 2016, Jacco Ville jaccoville@yahoo.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
>>>  
>>> ....And I certainly will do that.
>>> Learning learning....
>>> 
>>> Funny thing, I am more collecting and adjusting my Doepfer setup (or Dieter room as my wife is calling it) then making sounds. 
>>> But I think it is the best way to know the working of every part of this system. 
>>> 
>>> Cheers
>>> 
>>> Jacco Ville
>>> 
>>> 
>>> Verstuurd vanaf mijn iPhone SE Lunatik 
>>> 
>>>> Op 18 aug. 2016 om 12:19 heeft yahoo@doepfer.de [Doepfer_a100] <Doepfer_a100@yahoogroups.com> het volgende geschreven:
>>>> 
>>>>  
>>>> > .... By the way ;-)
>>>> >
>>>> > I found out the attenuator function of P1 and P2
>>>> > Very handy to set the threshold of the quantizer behaviour.
>>>> > I noticed that with critical voltages from my A155's with a knob
>>>> > fully cw the voltage of 0.970V in 1V modus was not enough to get
>>>> > a full scale from C to C.
>>>> > Now I made the threshold of the A156 a few mV earlier to deal with
>>>> > this problem.
>>>> >
>>>> > Cheers
>>>> >
>>>> > Jacco Ville
>>>> > The Netherlands
>>>> 
>>>> That's a solution. But the correct way would be to adjust the A-155 so that
>>>> it outputs 1.0V in 1V mode. For this a trimming potentiometer (P9') is
>>>> available on the upper A-155 potentiometer board.
>>>> 
>>>> Best wishes
>>>> Dieter Doepfer
>>>> 
> 
>