Doepfer

--- In Doepfer_a100@yahoogroups.com, <hardware@...> wrote:

> 
> Did you try this patch ? From the theory it will not work: The position gate
> signal is derived from the position CV signal with a comparator that
> compares the CV to GND (i.e. if the manual is released). If the comparator
> triggers the CV is already less than zero Volt and it's too late to sample
> the CV. If it would be that simple we had added a S&H to the A-198 module.
> In the R2M the microcontroller stores the "history" of the CV for a few
> milliseconds and if gate low is detected it goes "back in time" and picks up
> the last CV  before the low gate was detected. With analog hardware that's
> very difficult to realize.
> 
> Best wishes
> Dieter Doepfer
>


I just tried it out -- it had been a while.  Of course you're right that it's not so simple.  
What does work, however, is if you use an A-165 Dual Trigger Modifier to "smooth out" 
the trigger signal, by patching the ribbon gate to the A-165 top trigger in, then inverse 
out to the lower trigger in, then the lower inverse out to ther S&H trigger in.  Then the 
result is as I described.

I'm not sure exactly why this works, but it does ... !  

I also use this strategy for a strange button controller I have, an old AKG device which is 
just a simple button (like a doorbell) on the end of a long cable with a balanced 
1/4" (klinke) plug at the end, that I plug into the Foot Ctl.2 jack on the A-177 foot 
controller module.  The A-165 strategy above works for erasing the negative voltage the 
button creates when the button is not pushed.   (Does anyone know what this AKG thing 
might have been made for originally?)

Ernst