This document discusses mixing audio in Audition and approaches to common mixing problems. It outlines three truths about mixing that may initially be sad but lead to happiness: mixing requires good source audio, mixing is about balancing sounds not fixing them, and extracting elements from finished audio is difficult. Topics covered include using sound design to set scenes, balancing music and sound effects under voice, and techniques for addressing low levels, hums, noises, and explosive sounds like plosives.