[sdiy] Taking a Step towards - - --((FUTURE-PREDICTIONS))-- - -

[harrybissell]

Yes... but you get to stay up all night programming each of the ADSRs for
all the oscillators...  :^P

The reason why Additive Synthesis seldon is practical has nothing to do with
the
oscillators... but in the man-machine interface.  How do you handle it ?
Resynthesis...
heck why not just sample then...

Draw the waveforms... doesn't work. looks do not equal sounds.
Figure out a set of parameters that have the same ball-wrenching effects
as twisting a resonant filter knob and you will be getting there...

(I think even Cynthia will know what I mean, even lacking the direct
reference :^)

How to control all those oscillators in real time ???

H^) harry

James Patchell wrote:

> I would say even with 256 oscillators, you could make a fairly nice
> polyphonic additive synth.  If the fundamental freq is 200Hz, the 64th
> overtone would be 12800 Hz, which I would think would be quite
> adequate.  So 256 oscilators would give you 4 voice poly...and I would be
> willing to bet that 1024 oscillators would be no problem, and that would
> make 16 voices.  An additive synth in an XC3S400 would not be probably more
> than a hiccup.... :-)
>
> hic...hic...hic....
>
> At 10:59 PM 1/8/2004 -0500, Glen wrote:
> >At 09:27 PM 1/8/04 , James Patchell wrote:
> >
> > >         Well, I can easily see the XC3S400 being able to "emulate" at
> > >least 256 oscillators and 256 multi mode filters and 512 envelope
> > >generators (VCAs too), all at one time...in fact, if anything, I am
> > >probably underestimating.  The part seems to be capable of clocking at
> > >200MHz,  the part should be able to do all that in about 1.3 micro
> > >seconds....kinda gives you an idea of the power we are talking about.
> >
> >It sounds like you could build a nice additive synth on a single chip, at
> >least an additive monosynth. Is that about right?
> >
> >later,
> >Glen Berry
>
>          -Jim
> ***************************************************
> I'm a man
> But I can change
> If I have to
> I guess.
>
> Man's Prayer
> Red Green
>
> ***************************************************
> http://www.oldcrows.net/~patchell
>
> http://members.cox.net/patchell
>
> ***************************************************