Lost Files

In my music there were random files with letters that were unfamiliar and made random band/beat sounds. Because they were about 1 second I deleted them because I didn't know where the came from and assumed they were a part of an old program I used to have. Little did I realize I think they were a part of the side scroller. Now the only thing that is displayed when I want to rush down to a section, let's say "r", only the "#" symbol is displayed nothing like before. Is there a way I can restore this or fix it by maybe adding them back on?