VST question?

Yes I'm a newby and I have been adding Reapers VST plugins to my tracks. What does the, ' max FFT size ' setting achieve? ( bottom righthand corner of the Reaverb effect window ) Please explain. Thanx

Smaller FFT sizes will consume more CPU but have less latency (undesirable delay when you monitor a live signal, this doesn't affect already recorded tracks though). Higher FFT sizes will consume less CPU but have more latency. ZL mode attempts to give the minimum latency possible at the cost of very much CPU. So these settings don't affect the sound as such in any way, but if your computer gets overloaded with work, you may hear "glitches", which of course make the sound quality worse.

Thank You Xenakios 

Thank You Xenakios!