SMPTE ("simpty") is a time code system for synchronisation, and was created by the US Society of Motion Picture and Television Engineers.

So guessing from the track names (having not listened to them) they are to test studio synchronisation equipment.

This page seems to have some good technical info on it.

Jazz
(List 112, Mk2 12 gig #40. Mk1 4 gig #30. Mk3 1.6 16v)