Casio CZ/ VZ/ FZ - Pro Series

I'm certainly not claiming a deeper knowledge of psychoacoustics! 
Many members of the group are much, much more knowledgeable than I.

But the two questions I'm trying to answer in my work, are:
1. What are the minimum parameters required to re-synthesize an
analyzed instrument sound and have it sound right?  (My first-cut
analysis always yields a "distinction without a difference" for many
parameters - which ones can I omit?)
2. Which parameters can be varied in a (more-or-less) random way in
order to re-synthesize the kind of natural variation produced by
"natural" instruments?

I think #1 addresses your comment.  #2 is the reason I started down
this path of inquiry.

- synergeezer

--- In CZsynth@yahoogroups.com, "Summa" <flotorian@...> wrote:
>
> I wonder if any of you guys having a deeper knowledge about 
> psychoacoustics. It might be less costly to create algorithms that 
> fits to our limited perception than trying to recreate physical 
> models or exact waveform copies...
>   
> Just my 2 cents!
> 
> ...Summa
> 
> 
> On 16 Aug 2008 at 0:27, synergeezer wrote:
> 
> > Thanks. And thanks for the links.
> > Here's one for you, the complete text of Prof. David L. Benson's (of
> > the U. of Aberdeen) "Music: a Mathematical Offering":
> > http://www.maths.abdn.ac.uk/~bensondj/html/maths-music.html
> > 
> > Then there's Electronotes, another useful site:
> > http://electronotes.netfirms.com/
> > 
> > Does anyone know where I can learn about designing physical
> > waveguides?  Bose seems to make speaker cabinets using this
> > information, but I haven't located it, yet.  I had found Julius
> > Smith's excellent (I think it's excellent - but it's mostly over my
> > head!) site while looking for the subject, but could only find digital
> > waveguide info, there.
> > 
> > - synergeezer
> > 
> > --- In CZsynth@yahoogroups.com, "ezra buchla" <ezra.buchla@> wrote:
> > > > >> > "linear piecewise phase distortions". I think! > > > Hm, to
> > you, too. Could you give me a reference for your specific > > term?
> > I'm eager to learn! > > nothing fancy, just means a function that's
> > made out of line segments > (in this case a transfer function for
> > distorting the phase) >
> > http://en.wikipedia.org/wiki/Piecewise_linear_function > > this is how
> > the cz produces the initial waveforms (system iii in the > patent).
> > then there's an FM stage implemented as a hard reset of the > phase
> > ("higher harmonics control signal generator", or system iv in > the
> > patent), with a rather clever smoothing algorithm (just multiplies >
> > by a decreasing ramp at the modulation frequency! sweet.) > > anyway,
> > since 1983 people have come up with many additional > interesting
> > phaser distortion functions, ellipses and cycloids being >
> > particularly friendly. i find that sticking with various chopped up >
> > linear functions, and wavetables with pretty simple harmonic content >
> > (1st through 5th order or so), still gives more than adequately rich >
> > timbral results. > > > Karplus-Strong algorithm, > now there's quite
> > another beastie altogether. > >
> > http://music.calarts.edu/~ebuchla/karplus_strong_patent.pdf > > that's
> > KS's original idea for a digitar based on the excitation of a >
> > virtual string by random noise bursts. i made some programs a while >
> > ago (following the lead of folks like david jaffe at stanford), using
> > > a KS-like model of masses connected by springs, but introducing more
> > > complexity by using nonlinear terms in the force equations for the >
> > springs, and doing crazy stuff like connecting them all in a ring >
> > instead of a bridge-termination, and making arbitrarily weighted >
> > connections between non-adjacent masses (ending up with something more
> > > like a "spherical membrane" than a string, or anything else in the >
> > real world...)... also using these things as chaotic resonantors by >
> > using audio input for excitation rather than saws, impulses, or random
> > > number bursts... > > then lo and behold, recent releases of ableton
> > live include a rather > sophisticated stringlike physical modelling
> > synth (called... > "tensor"?), complete with nonilnearity, different
> > excitation > functions, variable damping, all kindsa stuff. neat! > >
> > in general this kind of thing is lumped together under the umbrella of
> > > waveguide synthesis. jaffe and julius smith at stanford have written
> > > quite a lot about it. > > smith maintains his extensive collection
> > of papers for free on his website. > http://ccrma.stanford.edu/~jos/ >
> > > perry cook at princeton has a nice book about synthesis inspired by
> > > physical models. it's useful without being overly math-y. "real
> > sound > synthesis for interactive applications." > > places to find
> > patents on the intertubes: > > patentstorm.us (gives you the text, pay
> > for the figures) > pat2pdf.org (free pdf conversion if you know the
> > patent number already) > > ok > > /eb >
> > 
> > 
> > 
> > ------------------------------------
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> 
> 
> -- 
> 
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