I tried this over in the Tech Support forum and wasn't able to find an answer, perhaps this will get more eyeballs on this forum:

I am trying to better understand how the following functions in the voicing menu affect the sound of any given pipe. I've read the Hauptwerk user guide but I struggle to understand the effect of these parameters, and I've also tried the "adjust and see what happens" approach. Could someone possibly provide a simpler explanation of each of these parameters?

Lo/Hi EQ: transition frequency (kHz).

Lo/Hi EQ: transition width (pct of trans freq).

Lo/Hi EQ: high frequency boost (dB).

Thank You!