the same data - 0s and 1s - goes onto the tape either way. LP means the tape goes slower, so more info is packed into a cm or inch. Put another way, the information thats packed into say 2 inches on SP gets packed into 1.5 inches on LP. The facvt that the data - video and sound - is packed into 1.5 inches instead of 2 (say) means more can be crammed onto the whole tape. So at LP a tape lasts 90 minutes, at SP, 60 minutes. Same tape length. More data.
Thus the data is packed tighter onto LP speed tape than SP speed tape, to achieve the same 'data-save'.
Tom is right.
The real question is, is he ever wrong!
