--- In Doepfer_a100@yahoogroups.com , "Monroe Eskew" <monroe.eskew@...>
wrote:

>
> That sounds like thru-zero amplitude modulation, which is nothing new,
> though it is a nice feature to put within one module. But thru-zero
> frequency modulation Still confused.

negative frequencies has nothing to do with inverted phase. it means
that the signal is going its way back. but of course the time continuum
will not be affected. this can happen at any amplitude of the signal,
therefore it doesn't invert the phase.

negative frequencies do occur with large amount of fm. imaginge the
frequency of an osc with 1kHz is modulated by another osc. if the
amount of modulation is increased there is a point when the frequency
is modulated between 0kHz and 2 khZ. if you increase the modulation
further the frequency finally goes to negative. thru-zero fm just means
that an osc can handle this.

regards,
oliver

http://www.namshub.ch/