Ok...i actually described Ringmodulation...which is indead 'highspeed' amp. modulation...i presumed Ring and Cross modulation are the same algorithms (well actually I wrote it all from the top of my head instead)...RingMod (and presumably crossMod) are what FM is to LFO-pitchmod (vibrato)...at very high frequencies you can hear actually hear new timbres being created instead of the volume of the sound 'trembling'...now I start wondering tho wether RIngMod and X-Mod are the same or not....somebody please help us..
----- Original Message -----
From: Patrik Rydberg
To: AN1x-list@yahoogroups.com
Sent: Tuesday, October 09, 2001 12:04 PM
Subject: Re: [AN1x-list] Re: -- Xmod --
Perhaps I should have been a bit clearer. The formula you described, adding
"sidebands" att the sum and the difference of the two main osc frequencys.
That is exactly what amplitude modulation does. Frequency modulation adds an
(in theory) infinite amount of sidebands.
/Patrik
----
The primary purpose of wings is to prevent flight
----- Original Message -----
From: "Bastiaan van de Werk" <bazziman@hotmail.com>
To: <AN1x-list@yahoogroups.com>
Sent: Tuesday, October 09, 2001 11:53 AM
Subject: Re: [AN1x-list] Re: -- Xmod --
> No I wasn't. I clearly talked about Pitch and Frequency...amp modulation
changes the volume (amplitude) of an osc. That's the diff between temolo and
vibrato.
>
> Anyway normally modulating the freq / pitch of an osc is done bij a
regular LFO; you can hear the pitch of a note shift up and down periodically
(depending on the shape, frequency of the LFO and the amount of modulation
used)..the LFO is of a relative long wavelength compared to the audible
DCO/VCO. The LFO itself cannot be heard: only it's modulating effect on the
audible DCO/VCO. If instead of an LFO you use DCO/VCO (in other words a fast
osc.) instead of aubibly modulating the pitch it start 'reshaping' the shape
of the cycles....try and picture this with a square modulating a saw or
sine. The square has...say about 1.5 times the shape of the other osc...it
gets a bit hard to imagine when more osc's are used in different
configurations but I gues you get the picture: by modulation the signal this
way you can effectively add extra frequencies (and harmonics) to the osc's
by rapidly, dynamically 'moulding' it's shape.
>
> ----- Original Message -----
> From: Patrik Rydberg
> To: AN1x-list@yahoogroups.com
> Sent: Tuesday, October 09, 2001 11:09 AM
> Subject: Re: [AN1x-list] Re: -- Xmod --
>
>
> Eh, I would say that what you described sounds like amplitude
modulation...
>
> /Patrik
>
> ----
> The primary purpose of wings is to prevent flight
>
>
> ----- Original Message -----
> From: "Bastiaan van de Werk" <bazziman@hotmail.com>
> To: <AN1x-list@yahoogroups.com>
> Sent: Monday, October 08, 2001 9:09 PM
> Subject: Re: [AN1x-list] Re: -- Xmod --
>
>
> > Cross mudolation results in extra frequecies being added to a signal
...i
> think if you crossmod 200 & 500 hz you get 'extra' frequencies at 300
and
> 700 hz... (or was it the sum and the product? it's either that or the
sum
> and the difference...) I am not sure how exactly these signal modify
> eachother tho.
> >
> > whilst FM is the modulation of the frequency of a osc at such a high
rate
> that instead of regular pitch modulation the shape of the character of
the
> oscillator gets changed. So instead of the tone going up and down you
hear
> this metallic sound.
> >
> > ----- Original Message -----
> > From: Thomas
> > To: AN1x-list@yahoogroups.com
> > Sent: Monday, October 08, 2001 8:04 PM
> > Subject: [AN1x-list] Re: -- Xmod --
> >
> >
> > --- In AN1x-list@y..., "Andrea TONI" <Andrea.Toni@e...> wrote:
> >
> > > have a look at this VERY nice articles
> > >
> > > http://www.sospubs.co.uk/sos/apr00/articles/synthsecrets.htm
> > > http://www.sospubs.co.uk/sos/may00/articles/synth.htm
> >
> > Thank you, those ARE very nice, but....i am not a mathematic
student,
> > i am a hobby musician...So please can someone explain what´s the
> > difference between the X-Mod of the AN200/PLG150AN and the FM inside
> > the AN1x?
> >
> > --Tom
> >
> >
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[Non-text portions of this message have been removed]Message
Re: [AN1x-list] Re: -- Xmod --
2001-10-09 by Bastiaan van de Werk