When I was young, this one effected me:
The Reader's Digest box set called "Organ Memories". It contained a recording of Virgil Fox playing Bach's
Toccata & Fugue in D minor (yes that one). I think it was on the Royal Albert Hall organ. The section that would haunt me was the counterpoint between a reed and flute in the fugue about halfway in.
Here is recording that demonstrates this starting at time mark 4:13. However on the RD recording he used a Cor Anglais for the reed vs a Clarinet heard here:
https://www.youtube.com/watch?v=xHs7DH2f2ugIf you have read the Carlo Curley book "In The Pipe Line", he talks about the lengthy rehearsal sessions that Virgil would do to prepare for a concert on the venue's pipe organ. He would agonize over registrations sometimes on section of the score of just 4 or 5 measures, experimenting over and over trying to find that perfect sound. I've heard that that on occasion, he would still be working out registration details minutes before the doors to the church or concert venue would open. I wonder is there anyone on the concert scene now who can 'transform' an instrument like he could.
Danny B.