Improvement on the original Piloton system of sync pulse in which two thin tracks are positioned at the centre of the tape (where they are more reliable) recorded in opposite phase (push-pull) and so do not reproduce in a full-track scan.
"I just wanted to let you know how pleased I am with the latest LP-to-CD transfer you've done for me. As usual, the sound improvement is amazing, and every detail is perfect. There are some older LP records that have never been made available as CDs, and I think I've sent you five or six over the past few years, and I've been extremely happy ..."
