SV: Re: [sdiy] Linear detuning !

[karl dalen]

I just tested linear detuning with this soft synth:
http://www.syntiac.com/synfactory_download.html

Take two Oscs same frequency, add an offset to the
linear input of one and sweep both on expo (FM)
input and "voila" linear detuning.

Now, these soft oscs seams to be of trough zero 
implemenatation but they seams to be simple
counterbased, i havent checked the Pascal code
that makes these OSC's.

However with this soft synth you can try out 
juergens sugestions of detuning!

Reg
KD


--- "JH." <jhaible at debitel.net> skrev:

> > Seems like a task for DCOs, anyway, because we are asking the oscs to stay
> > together very, very, tightly. I mean, this Linear-FM-for-Beating effect
> > works best if the 2 oscs have no beating to begin with. If you had 2 VCOs
> > that tracked so perfectly (for more than a short while after tuning),
> you'd
> > probably declare them sterile and digital sounding. ;-) Maybe some VCOs
> are
> > that precise, I dunno... but DCOs are, are course.
> >
> > I used to think that beating would sound just like tremelo -- so why
> > bother? -- but it totallly depends on the waveshapes.
> 
> 
> 
> Of course linear detuning _alone_ is quite boring.
> It's the combination of "linear detuning" and "expo detuning" that is most
> pleasant.
> 
> B = Beat frequency, f = oscillator frequency, d1, d2: constants
> 
> (1)
> Linear Detuning (adding a constant current after the expo converter, causing
> a fixed term of beat frequency):
> 
> B = d1 = constant ( = rather boring)
> 
> (2)
> Expo Detuning (adding a constant voltage before the expo converter, causing
> a
> linear term of beat frequency):
> 
> B = d2 * f (tends to either sound overly detuned in high registers, or
> having not
> enough effect in the low register)
> 
> (3)
> Combination of both:
> 
> B = d1 + d2 * f  (allows pleasant chorusing in low register, while not
> sounding
> out of tune at high register)
> 
> JH.
> 
>