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A-440: Concert A Embedded In a Scale of 5 Notes

  • Next, have a look at the big gap between G and C above Middle C. It so happens that yet another tone derived from a simple frequency ratio, 5:3, fits right in there. This tone happens to be the lovely and talented A-440 (Concert A). More about lovely, talented A-440 later on.
  • The scale grows to 5 notes (Figure 8):
Musical scale comprised of five notes and four intervals of simple frequency ratios.

FIGURE 8: C - E - G - A - C, a Scale that Includes A-440, or Concert A

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