WARNING: SPOILER ALERT

The sound file played backwards and slowed down says "Communication is the joint establishment of meaning"

Google this, and the third result goes to a Gallery.

The Gallery has an Alphabet board that looks like the second hint would line up with:

Taking the letters in order, you get:

ATZKEPIUVC

This is the password for the pastebin, which contains a URL to this:

https://postimg.org/image/c9d6jraq9/

with the clue "Find My Creator".

Reverse image search on Google leads you to a picture taken by Kevin Carter while covering the famine in Sudan.

(interesting read: http://all-that-is-interesting.com/kevin-carter)