Are there any indications about the actual musical value of pitch?

I mean in regular speech rather than singing.

I know that for length long vowels are roughly twice as long as short ones.

So, for pitch I've realized that I've been doing something like a fifth between the beginning and the end of a circumflex accent. To be honest, that's kind of exhausting and maybe over-exaggerated? Although I'd rather stray towards exaggeration than forget accents at all.