Peterson 490ST Strobe tuner....good?

Richard Brekne richard.brekne@grieg.uib.no
Tue, 02 Jul 2002 00:35:09 +0200


Hi Terry, and thanks for this enlightenment... tho perhaps you can further
clarify how the various <<weightings>> are actually carried out.

Is it such that it starts looking at curves for all the relavant partials...
spreads for these as one ascends and finds some optimal matching for each
set... a sorts of curve of curves ?... or does it base much on how loud
different partials are ?... Or does it search for some cumlative least total
signifcant (hearable) beats rates...?  any more specifics would be nice to
know.

RicB

 Farrell wrote:

>Hi Richard. Indeed, the Verituner calculates tunings very differently
>from the RCT, SAT or TuneLab. One can program in what partials to look at,
>which partials from which notes to compare, it can compare various
>designated partials from several notes to the target note, and it can
>weight the various partials from the various notes. Does that make any
>sense?
>
>Ron Koval has done much work on programming the way the Verituner works.
>For example, the following is how the lowest octave is calculated in one
>of his setups:
>
>The Verituner will look at 10:5 octaves, 4:1 octaves, and 8:1 octaves, and
>will weight them 30%, 35%, and 35%, respectively. In the middle of the
>keyboard, he is looking at 4:2 octaves which are weighted at 60% and 6:3
>octaves weighted at 40%. And on and on. You can change the rules for each
>octave. The Verituner measures up to like 8 or 12 partials on each note,
>and then uses whatever partials you inputted rules demand.
>
>
>
>Awesome machine!
>
>Terry Farrell
>  

Richard Brekne
RPT NPTF
Griegakadamiet UiB



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