The Eat at Joe's Kawai K5000 Message Board Digest
Insufficient Formant Filter Tracking


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Formant filter tracking
 Friday, 12-Jun-98 12:02:47 

      130.91.204.41 writes:

      The formant filter concept still has me confused. Should I think of it as a
      fixed multi-band EQ representing the physical characteristics of a modelled
      instrument or is it a user designed filter as found in an analog subtractive
      synth? Or both?

      As to the latter description, I'm wondering how to get the FF to track the
      keyboard. Do I have to use the FF envelope KS to do this?

      BOB. 

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Re: Formant filter tracking
 Friday, 12-Jun-98 13:43:36 

      192.28.2.16 writes:

      > The formant filter concept still has me confused. Should I think of it as a
      > fixed multi-band EQ representing the physical
      > characteristics of a modelled instrument or is it a user designed filter
      > as found in an analog subtractive synth? Or both?

      Yes. :) The "AcGuitar" patch in the patch archive is an example of the first.

      > As to the latter description, I'm wondering how to get the FF to
      > track the keyboard. Do I have to use the FF envelope
      > KS to do this?

      I looked at that a while ago and couldn't figure out a way. I set the FF envelope
      to 0 attack time and max sustain levels and then set the KS to max, but that
      still provided less than a whole step of scaling for each whole step on the keyboard.



      leiter 

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Re: Re: Formant filter tracking
 Friday, 12-Jun-98 17:15:59 

      130.91.204.41 writes:

      > I looked at that a while ago and couldn't figure out a way. I set the
      > FF envelope to 0 attack time and max sustain levels and then set the KS
      > to max, but that still provided less than a whole step of
      > scaling for each whole step on the keyboard.


      That's what I've encountered as well. It's very interesting how many K5K
      functions track inconsistently across the keyboard and sometimes from note to
      note. Some of my patches are killer for an octave but it's tough to stretch
      them beyond- but that's okay for the wierder stuff!! It reminds me of my MS20,
      both in the strange keyboard tracking as well as in the interaction between
      two nasty sounding filters. The Ms20 has resonant HP and LP- tweaking both
      cutoffs simultaneously produces a variety of unpredictable resonances. I've
      gotten similar effects with the K5K FF and DCF. Certainly the K5K has the
      most analog like (gritty, nasty, ugly and quite pleasing) digital filter I've
      encountered. 


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