Thanks Noel.
It turns out that what you call "Volume Envelopes" is the same as what this video I included
in a prior post is all about.
https://www.youtube.com/watch?v=Z5kKx5ThpSYIt explains the use of the nodes you just mentioned.
I guess my youtube search did work after all but I did not realize it because of the terminology difference.
I will play around with it (and everything else that has been pointed out) during my next mix session after the next jam.
I will never learn as much as you know Noel :-) Well maybe. I plan on living to 150 :-)
John