Since I'm lazy and I don't want to go search 6 pages of comments to find the answer, I will ask this question despite the fact it's probably been asked (and answered) at least once here before.
How are you ripping the PSG tracks? Do you use an emulator, some kind of HES extraction utility or are you playing them off the real hardware into a computer encoding MP3? If you are using a combination of these methods, it would be nice for you to make a note next to the download link telling which method was used for a particular game.
I ask because the few I've downloaded sound "off" from what I hear on my system. When it comes to audio, I'm all about 100% accuracy.
EDIT: OK, so I found the answer to my question. Apparently it was the first question asked in the thread. So..... My next question is, how would you feel if I said I'd be willing to re-"rip" some of those PSG tracks for you using the real hardware? Maybe I'd even go as far as to set up a small FTP server at home and mirror all the files so people don't have to deal with all that "MEGAUPLOAD" bullshit.