Broad Fourteens is a term often associated with a specific type of chord in jazz and contemporary music, typically referring to a dominant seventh chord with an added altered 13th. The term "Broad Fourteens" may also be used more generally to describe certain harmonic structures or concepts related to jazz harmony. In terms of music theory, a "broad" application could mean that the analysis or usage extends beyond a strict definition, allowing for creative interpretations.
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