What is a Transform Chord? Added Tone Chords vs Suspended Chords

I ran into a piano video the other day and the guy used the term 'transform' to describe adding a second to a chord. 'Transform' chord is junk terminology for the "Added Tone Chord" (e.g., C add 2). Hilariously, he was pounced on by the theory nazis who berated him for not knowing what a suspended chord was, however, the 'added tone chord' (his 'transform' chord) is not a suspended chord, which is, a suspension (replacement) of the major or minor third with, usually, a fourth.

See: Mu Chord

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