[sdiy] My FPGA synth implementation

[Ian Fritz]

At 02:09 AM 6/28/05, Chris Strellis wrote:

>   Would there be any way to modify the eight
> > frequencies?  Things like omitting some of the lower ones and
> > adding more
> > high ones, or making more general anharmonic sounds.
>
>Yes, it would be possible to change the frequencies of each oscillator 
>relative to one another.  Perhaps another 8 controls can be added to do 
>this.  As you can see it can soon become unwieldy to control the synth.
>
>My two controllers have 16 sliders each but only two user programable 
>slots.  This gives me 64 sliders worth of control.  I do have two Peavey 
>PC1600 16 fader controllers as well with 50 programs slots each so I could 
>have lots of control but you see it's getting complex :S

Right.  But the frequencies wouldn't necessarily have to be varied 
dynamically for this to be interesting.  You could set up the freq ratios 
as part of the instrument "patch".

>However, with only 8 oscillators it still isn't very harmonically 
>interesting.  It is very much draw bar organ territory.

That's partly why I was asking about dropping some of the lower harmonics 
and adding higher ones.  You could do some things that are very difficult 
to do by subtractive synthesis.  Just a thought. :-)

   Ian