True Love Ways. Now this was sung by Buddy Holly (not a Duo), Robson and Jerome (a Duo) and by Peter and Gordon (a Duo). I think this is one of my favourite pieces of all time, with that wonderful harmony throughout the piece.
My take on this. Played on my AR80 organ. The 'answering phrases' were done by making a 'double recording' ie. first recording the piece 'as is', and then adding those phrases whilst listening to the recording playing back.
The Robson & Jerome version:
.. and the Peter and Gordon video (with the words):
Hugh