who can help me?
i record a vocal file in vegas.
now i'll use some sound forge editing tool.
something like reverse , noise gate, etc.
after do that, i save the file and come back to vegas to 
continue my working. but when i listen the vocal track with
the music track don't look good.i need to undo my sound 
forge editions.
w h a t    c a n   i   d o ????
when i'm working in cakewalk , it creates a tool-copy of 
the file , and i can undo this operation.
what about vegas?
sorry my bad english.