1,2, and 3 point perspective, very useful.
If this helps
A dominant chord is a major triad built on the fifth scale degree of either a major scale or a minor scale. Major triads consist of a root note, a major third, and a perfect fifth. ... A simple D major triad contains the notes D, F♯, and A. This chord becomes a dominant seventh chord (V7) by adding the note C.
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The earliest fragment of musical notation is found on a 4,000-year-old Sumerian clay tablet, which includes instructions and tunings for a hymn honoring the ruler Lipit-Ishtar. But for the title of oldest extant song, most historians point to “Hurrian Hymn No.
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