Thanks again @h90rus.  Very helpful.

May I ask if someone can either (1) confirm my understanding of the following two points, or (2) correct me?

I believe that:

(1) the Strymon Volante can play the pattern in this video (at 2:40) because it will play repeats for heads that are not on (head #2 in this case); and

(2) HeadSpace cannot play this pattern because no repeats will sound for head 2 even if feedback path 1 & 2 has been selected?

I think I must be wrong about point #2 but I don’t know why.