This is one of the best games I have ever played. I found this in the past and I never posted it because I didn't found gamefaqs at the time.
Around in 2002, when you go to the docks area in the Dolphin Park (with lots of buldings and bridges area), just stay there. I hear the same main theme tune in the Nintendo 64 version of the game with the exact same sound in a soft whisper tone. I am not day dreaming or thought of something else. It was exactly there. I tried doing it again over the 5 years and I never got it again. I checked the music menu, it is not there. There is this easter egg in the game probably almost no one knows about. I want to know is that did any of you hear it? I am pretty sure someone else besides me heard it.