Thanks Uncle_Jerr, but I solved the problem late last night and didn't get chance to update the thread.
The problem lay in my RealTek Sound manager which has a karaoke feature - AND A DAMN PITCH SHIF ...
H=E=L=P PLEASE. I'm running COOL EDIT PRO. When I've recorded some material then play it back, I find that playback is running at a lower pitch - 2 or 3 tones lower, at a guess . I don't recal ...