Yeah you know - I figured in this case, it plays fine in Famitracker, there's just something causing NSFPlayer to skip over the D00 command - but you're right, I had it backwards, Famitracker is not the definitive player, NSFPlayer would be a lot more faithful to how it sounds on actual hardware.
it looks like it's too late to reupload the mp3, but I'll remember that in the future. 😓