No Film School shared a video created by the brains at Filmmaker IQ on The Fundamentals of Sound in Post Production. It does a good job of introducing the basic tools that sound editors and mixers use to work with production audio (it doesn't really go into any track-editing tricks, just mixing tools.)

At first I thought it was a little too basic because host John Hess does spend a lot of time on EQ (which of course, as the fundamental sound modifying tool, other than volume, I thought everybody already knows) but he does a great job of explaining what all the tools are, how they work and how they can be used. He covers EQ, Compression, Limiters, FFT and noise reduction and even some time-adjustment stuff like delay, chorus and reverb.

It's time to open up the digital audio workstation and look at the basics of common tools used in post production audio from Equalizers, Compressors, Noise Reduction, and Delay effects.