[sDIY]wavtbl synthesis combined with PD

[P.M. van Nugteren]

Paul Maddox wrote:
> 
> Paul,
> 
> >
> >If you'll really get to make a wavetable synth than you might think of
> >Phase Distort the wavetables with envs and multiple LFOs. It's very easy
> >to program (Casio could do it) and to control. And you'll get nice
> >non-linear synthesis combined with the nice linear wavetable synthesis.
> >
> 
> Not sure what you mean..
> do you mean like haveing ONE oscilator, two output waveforms, and one
> delayed by a variable amount controlled by EG/LFO?

No! You know the casio CZ series don't you (CZ 101, CZ1000/3000/5000)?
Phase Distortion (PD) is basically phase modulation, FM with the
modulator not being a continues waveform but a fuction. MC, Am I right?

Basically  a sine wave looks like this: you input an phase angle t (time
t=t+dt, td is the sampling rate) and a sinus function y(t)=sin(2pift)
will give you a sample height y(t) in bits. Here, the phase increment is
linear; dt is always the same amount. 

But if you modulate dt back and fort with a continues (sinus) fuction
you get FM, PD is similar, y(t)=sin(F(z)[2pift]) where F(z) is a
transfer-fuction. MC, I have got this info form several sources, I hope
my math writing is correct, if not correct me please.

MC I don't know which transfer fuctions can be used in order to limit
the output bandwidth, can you help us out? And which simbol do you use
for phi/pi?

Anyway, I'd love to make a VS clone combined with PD and maybe
waveshaping. All in the digital realm of course.

Regards,

Paul