Doepfer

two questions: what is the difference between a graphic eq and a fixed formant filter? and how does one determine the  settings if they were trying to emulate a real instrument, vowels, etc... is this something that is already charted, or is there a tried and true method of figuring it out?
   
  thanks...


[Non-text portions of this message have been removed]

On 11/6/06, Ross Goniakowski <carfull@sbcglobal.net> wrote:
> two questions: what is the difference between a graphic eq and a fixed formant filter? and
> how does one determine the  settings if they were trying to emulate a real instrument,
> vowels, etc... is this something that is already charted, or is there a tried and true method of
> figuring it out?

AFAIK, the difference is, that the filter frequencies and edge
steepness of the bandpass filters in a graphic eq are fixed, whereas
on a fixed formant filter, you would have control over resonance and
frequency (but no voltage control, so it is a "fixed formant filter",
because you cannot dynamically change the frequency of the bandpass).

As for formant settings: there are lists on the internet where the
formant frequencies of different acoustic instruments are listed. I
don't know an English one, but I think the following document could
help you, even if you don't understand German:

http://www.sengpielaudio.com/FormantenPraegenDieKlangfarbe.pdf

HTH,
-Michael

AFAIK any equilizer can amplify and attentuate certain freq.s while a
filter is only capable of the latter. Rgs, Ingo

--- In Doepfer_a100@yahoogroups.com, Ross Goniakowski <carfull@...> wrote:
>
> two questions: what is the difference between a graphic eq and a
fixed formant filter? and how does one determine the  settings if they
were trying to emulate a real instrument, vowels, etc... is this
something that is already charted, or is there a tried and true method
of figuring it out?

>    
>   thanks...
> 
> 
> [Non-text portions of this message have been removed]
>

And the fixed filter bank closes completly when all controls is at 
zero. No signal passes.

Keld

--- In Doepfer_a100@yahoogroups.com, "ilanode" <techmeier@...> wrote:
>
> AFAIK any equilizer can amplify and attentuate certain freq.s 
while a
> filter is only capable of the latter. Rgs, Ingo
> 
> --- In Doepfer_a100@yahoogroups.com, Ross Goniakowski <carfull@> 
wrote:
> >
> > two questions: what is the difference between a graphic eq and a
> fixed formant filter? and how does one determine the  settings if 
they
> were trying to emulate a real instrument, vowels, etc... is this
> something that is already charted, or is there a tried and true 
method

> of figuring it out?
> >    
> >   thanks...
> > 
> > 
> > [Non-text portions of this message have been removed]
> >
>