[PD] env~ argument confusion

[Peter P.]

Hi,

I can't seem to understand what the second argument of [env~] is for.
The first argument is the window lenght for RMS analysis, but the second
argument is supposed to set "period in samples per analysis (window/2
default)". It seems I am getting two analysis values per window size
with the defaults of
[env~ 1024 512]
How would that be different from
[env~ 512 512]
?

Thanks for any help here!
P