조성음악 연구 v

Establishment and Reestablishment of the Tonic Key

We may expect the presentation and prolongation of the tonic harmony in the beginning of a tonal piece. If some harmonies that confirm the tonic are omitted, how can we recognize the tonic key? These questions drove me to examine how the tonic key is established in the beginning. In fact, the tonic key is established by chromatic or diatonic harmonies. When there is no obvious tonic in the beginning, the tonality can be established by means of the following ways: first, the tritone is an important element to identify the tonic key; second, the presence of the dominant and subdominant is another attribute to confirm the tonic key; finally, the tonic key is settled by a melody showing an outline of the octave division into 5th (-)and 4th(-).