MOTM

At 12:58 AM +0000 2002/01/27, mmarsh100 wrote:
>What's cool about "through zero"?  I've heard it mentioned several
>times on the list but I still don't know what it refers to...
>
>Mike

I've never had an oscillator capable of through zero FM, so I can't 
comment on how it sounds. If I remember this correctly (brain isn't 
as young as it used to be), the oscillator waveform changes direction 
as the FM signal drives the frequency below zero Hz. With most 
oscillators, the waveform will just continue in the same direction.