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17L24 8 8 24l16 16 2. What can we help you with? Share suggestions, ask questions, and connect with other users and top contributors in the Google Search community forum. Get the most out of Google with the latest additions to Search. This article is about the musical system. The other tones in a tonal piece are all defined in terms of their relationship to the tonic. By the middle of the 20th century, it had become “evident that triadic structure does not necessarily generate a tone center, that non-triadic harmonic formations may be made to function as referential elements, and that the assumption of a twelve-tone complex does not preclude the existence of tone centers”.
For example, “Sainsbury, who had Choron translated into English in 1825, rendered the first occurrence of tonalité as a ‘system of modes’ before matching it with the neologism ‘tonality’. Musical phenomena perceived or preinterpreted in terms of the categories of tonal theories. To function as a tonic, a chord must be either a major or a minor triad. Dominant function requires a major-quality triad with a root a perfect fifth above the affiliated tonic and containing the leading tone of the key. This dominant triad must be preceded by a chord progression that establishes the dominant as the penultimate goal of a motion that is completed by moving on to the tonic. A dominant seventh chord always consist of a major triad with an added minor seventh above the root. The last of these progressions is characterized by “retrograde” harmonic motion.