John Lyon has kindly offered to show us a live demonstration of how to run an online session with multiple performers in different locations. After that discussion we can continue with the blues.
Thomas has passed me a link to a very polished presentation that shows what can be done with sufficient time, effort and dedication.
.https://www.youtube.com/watch?v=nNj7LyHqwFE
Most of this is serial composition. Only a few portions have more than one person singing so the amount of synchronization is manageable.