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@...>
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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