Talking about the all night concerts, I did some of the first all night concerts back in the 60's with this little harmonium, and I also had saxophone taped delays. ↗
Throughout the evening I would be recording these long saxophone delays and about four hours into the concert, if I wanted to take a break I would just play back the saxophone. ↗
As a horn player, the greatest compliment one can get is when a person comes to you and says, 'I heard this saxophone on the radio the other day and I knew it was you. I don't know the song, but I know it was you on sax.' ↗