I have noticed some comments regarding Score Productions music cues, and how some of them were pitched differently at different times -- the most notable, of course being TPIR's theme, which was a half-step lower until 1983ish. Other themes that seem to have had pitch changes over time include Narz Concentration (half-step lower in 1st season, according to another poster); MG'7x (half-step lower in final seasons); and possibly FF'94 (apparently the on-air versions were faster than the versions available online).
My question is: Why was such a practice done in the first place? Did someone at Score think that it really made that big of a difference to play a theme in say, F-sharp instead of F, or at 122 BPM instead of 120?