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Re: [Doepfer_a100] help for starter needed

2015-11-22 by Florian Anwander

On 22.11.15 17:23 , iop poi omega_images2000@yahoo.it [Doepfer_a100] wrote:
> now, first, in the A190-1 manual it says that all VCOs in the same bus 
> can be controlled by the internal connections.
> may i supose that this means only Doepfer VCOs?
Yes, that is valid only for Doepfer VCOs. For other it depends on the 
dedicated "foreign" module.
> if at some point i get a Braids module, should i control it by 
> connecting the cv out of A190-1 midi-to-cv,
> and, if yes, will plugging the cv out of 190-1 be breaking the 
> internal connection?
The outputsockets never beak the connection to the internal bus. They 
are simply parallel. So: if you will hava a Braids and a A-110, then the 
A-110 will get the CV from the bus, the Braids will get its CV via a 
cable from the Interface CV-out to the Braids CV-In. (I have exactly 
this combination in my live case, so I know it for sure :-) )



> second, and most important, while searching for info about the cv/gate 
> internal connections,
> i read that sending two gates on a bus controlled by the A190-1 
> internal connections can cause damage!
> in fact, a person said that
> "module fried by having a Midi interface and manual gate on the same 
> buss by accident."
>
> is that correct?
I'd say 99% it is wrong. It might happen, if the MIDI-interfaces gate 
out is completely unsecured (direct connection to the CMOS-chip). I 
think the very old MCV-1 interface had only a resistor between the uP 
chip out and the socket; this could lead to problems with high voltage 
gates from old ARP or Roland synths.
But the A-190-1 has a transistor-buffer in the gate-out line. So there 
is no danger at all.

For your example: you simply can let the interface send its gate via the 
internal bus, while you insert the LFO-"gate" to the Gate-In at the 
front of the second ADSR. This will break the connection to the internal 
gate bus. There will be no "shorting" with the internal gate.

Florian

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