Doepfer

Hi Dieter

>> this zero crossing
> But for this function you have a control at the module (for most modules)
> that is controlled by the ADSR:
> 
> e.g.
> Initial gain for VCAs
> (coarse) tune for VCOs
> Frequency control for filters
I think this is not really what is meant by Stu and Ross. Mostly 
regualting the Amount of an offset modulation is cannot really be 
achieved with these general offset parameters:

Imagine a sound, whith no VCA involved and look at the the 
cutoff-frequency. This graph is the cutoff frequency modulated by an 
envelope with the gate added as offset:

^ Level                  /\
|                       /  \
|  -----------------+  /    \             +----------
|                   | /      \----------\ |
|                   |/                   \|
+---------------------------------------------------- ->Fq

Of course you could add the Gate as separated voltage, but if you do so, 
you will loose the possibility to control the amount of the resulting 
envelope.



Other (non graphical explained) example: An LFO generates a symmetric 
rectangle wave from -2.5 V to +2.5V. If you want to use this as tonal 
interval modulation, you want to have a rectangle from 0V to +5V. ok 
simply add 2.5 Volts. But now you want to control the amount of the 
modulation (vulgo the interval).
Again: This is something you cannot achieve practically with the general 
offset of the basic parameter "tune" (of course in technical theory you 
are right, but you cannot not handle this in a real realtime livesituation).


Florian





> 
> For (nearly) all modules each CV controlled parameter is already equipped
> with an offset control. That's why I still do not understand the necessity
> for an external offset module (with a few exceptions like the A-132 or the
> limited tune range of the A-110).
> 
> If you have an external offset module and adjust the offset control it's
> exactly the same as if you move the corresponding control of the module as
> all the control voltages are added up. The only reason could be that you
> want to have this as kind of a remote control. Otherwise you will have two
> controls for the same function.
> 
> Best wishes
> Dieter Doepfer
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 

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Florian Anwander                  |ConSol
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