What is a chord and what is the use of guitar chords? I really don't understand! !

Chords come from Greek χ ο ρ? A concept in music theory refers to a group of sounds with a certain interval relationship. Three or more sounds are vertically combined according to the overlapping relationship of three degrees or non-three degrees to form a chord.

Trichord: There are usually three chords (three chords), seven chords (four chords), nine chords (five tones), eleven chords (six tones) and thirteen chords (seven tones). Non-third-degree chords usually include: hanging chords, strong chords (that is, fifth-degree chords) and so on.

In the industrial design of audio equipment, chords are also called polyphony, which means that multiple sound sources are pronounced at the same time. Generally speaking, on the piano, there are three chords and seven chords, and there are few nine chords. In guitar, chords are usually swept and decomposed, and another chord has many methods of bending.

Extended data:

Intrinsic characteristics

Harmonious elements of "chord"

Interval: two semitones make up a whole tone, that is, the second degree. A whole tone plus a semitone is called a third degree, and two semitones make up a third degree. These degrees, whole tone and semitone, all indicate that the distance between sounds is different, that is, the interval.

Frequency:

① The frequency ratio of two sounds, octave 1:2, fifth interval 2:3, third interval 4:5, third interval 5: 6 ... The larger the two integers representing the frequency ratio, the worse the coincidence degree.

② The frequency ratio of three sounds, such as "major triad" is three degrees greater than three degrees * * * is 4:5:6, "Minor Chord" is three degrees greater than three degrees, and the frequency ratio of its three sounds is 10: 6544.

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