hey i'm an adam too welcome to EoFF

sp the game was saved just before it reached cloud on the shore and then he died in the battle against diamond weapon? and now neither diamond weapon or the music are ther? have you tried visiting the places before that event (city of the ancients, is the key in your key items?) try entering there and coming out agen. if not then i dunno

ive never heard of this before but if that doesn't work then all i can suggest is starting a new file