Pharm,
You can go to ESU Lok Sound, QSI, and Soundtraxx's websites and do the research there.
In case there isn't a specific F59 sound scheme available, you can still come reasonably close being that it's an EMD.
The prototype F59HI is equipped with the EMD 710 series diesel (12 cylinder) power system. If I'm not mistaken that sound scheme is available from a couple of the DCC Sound manufacturers. If you're modeling Amtrak or Metrolink, the Nathan K5LA horn sound will work nicely
"I like my Pullman Standards & Budds in Stainless Steel flavors, thank you!"
Gentlemen,
Is there a sound decoder which replicates the sound of a F59PHI engine? If there is not a pre-loaded decoder available, are there sound files available which might be loaded into a decoder? Thanks guys!