The triad formed by the main chord on the main tone (level 1), namely 1 3 5, is called "main chord" and marked with T. The main chord appears at the beginning and end, followed by the seventh chord.
2.s stands for subordinate chord. Take C major as an example, namely fa, la and do.
The dominant chord is a chord constructed on the dominant tone, which is the fifth tone in the phonology. The fifth tone in C major is SOL (the fifth tone in D major is la, etc.). ), so the dominant chord is the SOL, si, re(5, 7, 2) chord mentioned in the first sound.
3, d stands for dominant chord. Take c major as an example, that is, sol, si and re.
D capital letter mark, here refers to the function mark, indicating that a chord has its progressive function. And in acoustics, chord progression not only has the function of marching but also has the function of color, so it has a certain use opportunity and way.
Extended data:
1, positive case.
The series composed of the main chord and the main chord is called the standard orthogonal series according to its function, and the harmonic series is as follows:
Function name: t-d; d—T； T—D—T； D-T-D； T-D-D-T
Chinese name: main genus; Owner; Lord-genus-Lord; Genus-main-genus; Lord-genus-genus-Lord
Roman numerals: I-V; Five-one; I-V-I； Five-one-five; I-I-I-I
Corresponding chord in c major: c-g; c—G； C-G-C； G-C-G； C—G—G—C
2. change the grid.
Consists of main chords and subordinate chords. According to their functions, they are called variations, and the harmony series is as follows:
Function name: t-s; T—S—T； s—T； S-T-S
Chinese name: master and slave; Master-slave type; Slave-master; Subordinate-master-subordinate
Roman numerals: I-IV; One to four to one; Four-one; Four, one, four
Corresponding chord in c major: c-f; Carbon-fluorine-carbon; f-C； F-C-F
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