I recorded a file in a classroom, but there was a lot of noise.
I removed the noise using the tool provided by audacity.
But, I realized that this noise reduction was not properly done.
Now, I need to restore the file as it was at the begining to do it again with better knowledge.
In my directories, aside the audacity file (20170131.aup) I have a directory (20170131_data).
Is it possible to restore this file as it was before?