A model for the internal representation of pitch sequences in tonal music is advanced. This model assumes that pitch sequences are retained as hierarchical networks. At each level of the hierarchy, elements are organized as structural units in accordance with laws of figural goodness, such as proximity and good continuation. Further, elements that are present at each hierarchical level are elaborated by further elements so as to form structural units at the next-lower level, until the lowest level is reached. Processing advantages of the system are discussed.

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