[sdiy] Electronotes, op-amp substitution, thru-zero oscillator...

[Grant Richter]

> Please clarify for me, in case I'm misunderstanding but - don't you  
> have to build a through-zero VCO, if you wish to do TRUE FM  
> synthesis??

I don't care about the mathematics of rotating vectors.

Is the sound improvement that dramatic to be worth the added cost for  
a regular audio VCO?

I know it is good for frequency shifters and LFOs. Proved that to  
myself.

I can't hear any significant difference between thru-zero and not  
thru-zero FM. It just sounds like FM to me.
Virtually every modulation process produces sidebands. AM, Ring Mod, FM

I mean, so what if the sidebands are 6 dB louder or whatever, why is  
this a big deal?

Are the sounds so much more musically significant or what?

Am I missing something? Or is this just chasing a theoretical ghost  
down a money hole?