FM low freq w/ high?

[Robert Sterns]

I recall reading that it is possible to frequency modulate a low
frequency with a higher one, as opposed to the usual other way around.

For example, FM a 100Hz sinewave modulated by a 1KHz sinewave.

Does anyone have any idea how this would work in practice?

I generated this in CoolEdit (audio waveform editor) and it does not
look like a normal FM signal, of course. The high frequency just rides
upon the lower one as a superimposed AM.

Is that all there is to it?

Robert

 

[Luhan Monat]

Robert Sterns wrote:

I recall reading that it is possible to frequency modulate a low
frequency with a higher one, as opposed to the usual other way around.

For example, FM a 100Hz sinewave modulated by a 1KHz sinewave.

Does anyone have any idea how this would work in practice?

I generated this in CoolEdit (audio waveform editor) and it does not
look like a normal FM signal, of course. The high frequency just rides
upon the lower one as a superimposed AM.

Is that all there is to it?

Robert
Hi,

You have just re-invented FM systhesis (Yamaha DX series).

--
Luhan Monat (luhanis 'at' yahoo 'dot' com)
"The future is not what it used to be..."
http://members.cox.net/berniekm

 

[Zak]

Luhan Monat wrote:

You have just re-invented FM systhesis (Yamaha DX series).

Also used in many ancient PC sound cards as synthesizer.


Thomas