okay when u say deleting sound files ... do you mean manually deleted ?

if thats it then check recycle bin but probably u meant a permanant ban ...
so try this program ...
Download Recuva 1.26.416 - FileHippo.com
this will recover almost any permanant deleted files/folders
you will need to know the directory of the files you deleted post back if that worked/not worked for ya
welcome to the forum