Hi-Fi TV Soundtracks (pre 1978) - Why?

[kfbkfb]

http://www.cco.caltech.edu/~boyk/spectra/spectra.htm
^^^
...a cymbal crash shows no sign of running out of energy at 100 kHz.

I was actually wondering if anyone mentioned to TV soundtrack
(theme music and music in the episodes) composers that, due to
technical limitations, some/most of the harmonics of certain
instruments wouldn't be heard by home TV listeners (using those
instruments for dramatic effect might not have the desired result)?

Kirk Bayne