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Section 8.2 The IV/5 “sus” chord

An additional four-note chord that sounds like and functions similar to a \(\left.\text{V}^{7}\right.\) chord is the \(\left.\text{IV}\right.\)/\(\hat{5}\) (or \(\left.\text{F}\middle/\text{G}\right.\) in \(\text{C}\) major) chord. In popular music this chord often is substituted for the \(\left.\text{V}^{7}\right.\) chord

F triad with G in bass, also known as F/G

Here is a musical example with the \(\left.\text{IV}\right.\)/\(\hat{5}\) chord in \(\text{A}^♭\) major.

Figure 8.2.1 Vincent, “O–o–h Child”