SergeModular

Thanks for this explanation. It's really helpfull.
I have tried Linear FM with the High end osc. from the Doepfer A100,
but meaby I did something wrong, but I couldn't hear much difference
between Exponential and Linear FM? That and I couldn't get excited
about the results. I try this with your example again and when I have
the Serge I can compare the two of them.

So when I understand it correctly, the main goal of Linear FM is to
change the timbre, which means that if you want to get new sounds,
Linear FM can lead to other results dan Exponential FM. You also said
it changes the pitch, but how much, you can actually hear the
changing of the pitch?

What's Max/MSP 5?

Roel

--- In SergeModular@yahoogroups.com, Chris Muir <cbm@...> wrote:
>
>
> On Dec 10, 2008, at 4:22 AM, roelelec wrote:
> > Can you describe soundwise the difference between exponential and
> > linear FM?
> >
> Linear FM changes timbre more than pitch. It bypasses the
exponential
> convertor of an oscillator, and just modulates the frequency of
the
> oscillator. If you have two oscillators set to the same pitch, and
> have on linear FM-ing the other, the oscillator that is being
> modulated (the carrier) sweeps the harmonic series as the depth of
the
> linear FM increases. When the ratio of pitches of the two
oscillators
> is itself harmonic, you get harmonic sidebands.
>
> Exponential FM creates inharmonic sidebands, more or less no
matter
> what you do.
>
> They both have their uses.
>
> If you have Max/MSP 5 I could send you a simple little patcher
that
> illustrates the difference.
>
> - C
>
> Chris Muir
> cbm@...
> http://www.xfade.com
>