NSF (which stands for Nintendo Sound Format) are soundfiles created by taking the assembly (machine language) code for music in an NES game and extracting it into a separate file. You can then play the sound from the file by using a myriad of NSF players.   
            Related categories 1
Sites 2
NES Audio Zone 
                                  
                                  
                                    Players and files for the NES.
                                    
                                  
                                Zophar's Domain: Nintendo NSF Archive 
                                  
                                  
                                    An archive containing many NSF files.
                                    
                                  
                                
      Last update: 
            January 2, 2007 at 21:39:47 UTC