And so now we come to the theory that Bach’s chaconne is about the death of his wife, as explained in the tin-foil-hatted liner notes to Morimur. Loopy though the theory is, it’s popular for a reason. Music is abstract, and it helps to have a narrative to hang onto when we listen. Even professional musicians like the hidden message idea. Markham quotes his students:
In a nutshell, mastering incorporates all of the audio work done on the master output from a mixed song or album. While originally intended as the mechanical preparation step for putting music into its final media format for playback, mastering later began to include additional post-mixing audio enhancement work in order to optimize the sound specifically for the various intended playback formats (ex: vinyl, CD, digital, etc.).