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In this video we will talk about chords and the main triads of the scale. A chord is a consonance of three or more sounds. Any chord consists of intervals. A triad is a chord consisting of three sounds arranged in thirds. For example, do mi sol. The lower sound of the triad is called the prime, the middle one is the third, and the upper one is the fifth. The triad is designated by the numbers 53. For example, the tonic triad will be designated as T53. In a tonality, there are three main degrees of the scale: I - tonic (T) IV - subdominant (S) V - dominant (D) Triads built on the main degrees of the scale are called main. And they are designated as follows: I - tonic triad T53 IV - subdominant triad S53 V - dominant triad D53 In everyday life, they are usually simply called the tonic, subdominant and dominant. These chords are called main because they are built on the main steps of the scale and will express the scale coloring of the tonality by their sound. That is, in major they will sound major. Triads from other steps will sound differently. In minor everything will be the other way around.