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. 2019 Feb 15;13:30. doi: 10.3389/fnhum.2019.00030

Figure 1.

Figure 1

(A) Schematic representation of a cycle. In this example, the first tone quartet (F4-E4-G4-A4) was repeated four times before the second tone quartet (F4-E4-G4-D4) was repeated four times. (B) Schematic representation of a tone quartet.