So, if this is a limitation in the LAME codec itself I can live with that - if the result is 'transparent' to my ears in real life i don't mind - i was curious why the cutoff occurs...
It will behoove you to follow Kohlrabi's advice before digging further into how lossy compression works.All that matters is what you hear. What you see is irrelevant.
primarily horns, sax, vocals are the frequencies i wish to preserve as much as i can
if this is what occurs by forcing lame to retain higher ones)