If I understand your new sone plugin correctly: yes, I think "base" and 
"sync point" should be the same. Actually, I can't imagine a practical case 
where they would be anything other than zero. The point of the sone curve is 
to convert the entire amplitude curve/range to more equally perceived 
increments in loudness. The user can specify whatever portion of the curve 
he wishes to use (which normally includes silence as the starting point).

Art Hunkins

----- Original Message ----- 
From: "jpff" 
To: "Developer discussions" 
Cc: 
Sent: Wednesday, December 17, 2008 5:18 AM
Subject: Re: [Cs-dev] Draft Release Notes


>>>>>> "Andres" == Andres Cabrera  writes:
>
>
> >> New Opcodes and Gens
> >> GEN20 type 6 now has option to set variance
> >> sone GEN as a plugin to mimic gen13 in Music360
>
> >> Dither on output implemented; rectanhular and triangular dither
>
> Andres> Are there docs for these?
>
> GEN20 is up to Victor.  I only wrong sone a couple of days ago and i
> am not sure that the specification is correct yet (at present lowest
> value in table is also sync point; should sync be different from
> base?).  But will write something.
>
> The dithering is rather complex, as it was assumed to be working until
> recently when I discovered that it was not.  The dither is different
> in each of the realtime systems and in libsndfile.  I will try to
> write notes, but not sure where it fits in the manual.
>
> >> Using a as the MIDI port listens on all
>
> Andres> Only on the portmidi module.
>
> thanks; text adjusted
>
> ==John ffitch
>
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Art
  There is a real problem with making the perceived and physical value
  coincide at zero as the formula is per = k * phy^alpha and this
  collapses at zero values.  If anyone had the code from Music360, or
  even the manual page, it might be possible to determine what is
  required.
    One could fiddle so zero at start of table, next point agrees and
  then follow the formula.  Would that be OK?
==John ffitch

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