Linear vs EXP

Hello my friends! I have some questions for you
Exponentional FM in analog synths?
To emulate lin FM of analog synths I should use EXP mode in Reaktor
but what I should do to imitate exp FM of analog synths in Reaktor?
And what I should do to imitate lin TZ FM of analog synths in Reaktor?
Lin FM actually is FM, but exp FM is obviusly audio-rate pitch modulation?


I am confused in terms of when it comes to hardware in relation to the software.
Lin FM in harware/analog is pretty much (or exactly) the same as Exp FM in software/digital?
But what is software equivalent to Exp FM and Lin FM in analog/hardware?

 

read doepfer A111 pages 5-8

 

So Exp mode in Reaktor is the same as Lin FM in the analog oscs? That's because Bento box Exp mode proportionally changes in pitch, not in octaves?
Then the question arises, how to get exp FM, exp TZFM and lin TZFM of analog oscs? And for what Reaktor have lin fm and lin tzfm modes, if we can get analog lin FM using exp FM in Reaktor?

 

You have to use audio signals. And the following is only basic.
Exponential FM analog is the same as pitch modulation in REAKTOR. So if you have a pitch of p=69 and it is modulated by an audio oscillator with amplitude 2 you get an oscillating between p=67 and p=71. With amplitude=12 (one octave) you get Doepfer's example (VSS=2V)
Linear FM analog is the same as frequency modulation in REAKTOR. So if you have a pitch p=69 which is f=440Hz and modulate the frequency with amplitude 220, you get 660Hz and 220Hz (like described in Doepfer's manual):

 

Very interesting! Can you share this ens?

 

oh, it is no ensemble only a five minutes job while reading Doepfer's manual.
For pitch modulation you can use RUHR. The basic idea in my last post is very basic and you can try it at once by yourself.
True FM-synthesis (better phase modulation) is a little bit more complex (my next subject).
It will be part of REAKTOR RIDDLES too, perhaps chapter 10 .
But you can download a simple example from here: FM Synthesis

 

Hello Herw! So, in the difference between exp and lin (in the Reaktor) this is a question what scale is used by modulator? If I'll set free freq control on the modulator osc I'll get lin FM (even though I set exp more or lin TZFM?) and vice versa If I'll set pitch control on the modulator osc I'll get exp FM (even though I set lin more or lin TZFM?) ?

 

no - the difference is where the modulation happens in signal way.
See picture in my last post #4:
1st: pitch modulation and then p2f-module
2nd: p2f-module and then frequency modulation.
ciao herw

PS: i have to study true-zero-oscillators (from Doepfer's manual). But i don't think it's difficult.

 

Thank you, now I understand!