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Ratio of 2:1—The Simplest Musical Scale
Start building the scale with the tone Middle C, the first tone in Table 8 above, with a frequency of 261.6 Hz.
Next, in accordance with the organizing principle of simple frequency ratios, add a second note, derived from the simplest possible ratio, 2:1. What you get is a two-note “scale.”
This scale clearly has its limitations. But you have to start somewhere (Figure 5).
FIGURE 5: Ratio fo 2:1—Scale of “Middle C” and “C Above Middle C