Statements such as: "“The simplest way to establish a key, then, is to play the tonic of the key many times, play it loud, and play it long" demonstrate a complete lack of understanding of how we actually understand music. In fact, the simplest way to establish a key is to play the the unstable interval (B-F in C Major), which cries out to be resolved to C-E, and establishes "the key of" C Major much better than a repetition of a single pitch. Unfortunately, the author's lack of understanding of music audiation causes the rest of what he has to say to be cast under a shadow of dubious suspicion.