The sound name, as the name implies, is the name of the predicate sound. We name each group of seven white keys on the piano (keyboard) with English letters: C, D, E, F, G, A, B, which are called note names. The middle white key is the C sound. The one to the right is the D sound, the one to the right is the E sound, and so on, seven sounds are repeated (white keys only). Among them, the interval from C to D is a whole tone, and the interval from D to E is a whole tone. The following are: E-F is a semitone, B-G is a semitone, and A-B is a whole tone. For example: in the key of C, 1=C, which means that the note name of 1 in the key of C is C, and the note name of 2 is D. Then from C to D in the same octave, D is sharper than C. How much higher? We say, D is one degree higher than C.

In the music system, although there are more than a hundred tones with different pitches, the sound names only have these seven basic tones, also called essential tones.

Sharp tone

Raising the basic tone by a half step is called a sharp tone (sound? Khan!: ). It is expressed by putting "#" in the upper left corner of the letter that represents the specific sound name. Such as: #C, #E. . This can only mean in the front, not in the upper left, sweat!

Flat tone

Lowering the basic sound by a semitone is called a flat tone, which is represented by a "b" in the upper corner of the letter that represents the name of the specific sound.

Variated scale: A varied scale refers to a scale that contains sharp and flat marks. It adds a sharp and flat semitone between each whole pitch of the natural scale. #1 b2 #2 =b3 These are homophones, but different names.

-Notes and roll calls

There are many ways to record music, such as five-line notation, simplified notation, six-line notation, etc.

For example, in musical notation, the symbols that record the pitch and length of sounds are called notes, which are composed of 7 Arabic numerals or decorated with other symbols.

The basic symbols for recording drafts are , just represented by seven Arabic numerals. Each of these seven numbers represents a note name, and its pronunciation is the roll call of the note name:

Simple notation 1 2 3 4 5 6 7 1

The note name C D E F G A B C

Roll call Do Re Mi Fa Sol La Ti Do

Note: In this scale, 3-4 are separated by a semitone, 7-1 are also separated by a semitone, and the other two adjacent tones are all separated by a whole tone. It is also an extremely important formula in guitar music theory. On the guitar fretboard, a semitone is the distance between two adjacent frets

-Major key and relative minor key

Each major key is six degrees up (or three degrees down) ) are related to each other, and they use the same scale.

Relationship major-Relationship minor

C!Am

D!Bm

E~#Cm

F~Dm

G~Em

A<=>#Fm

bB<=>Gm

Overview of four-chord knowledge

The chord referred to here usually refers to three or more tones of different heights sounded at the same time. The arrangement of the note names is any of the seven tones C/D/E/F/G/A and B. A single note can be used as the tonic (that is, the root note) plus its upper third and upper fifth to form the most basic triad, as follows

C 1 3 5

E 3 5 7

F 4 6 1

G 5 7 2

A 6 1 3

B 7 2 4

The above seventh chords are composed of three tones separated by three degrees, so they are called third degree chords. These seven triads are the foundation of all chords. .

Triads

The above seven basic triads can be divided into three different types of triads in terms of intervals

1 Major triad

There are four semitones from the tonic to the third; there are seven semitones from the tonic to the fifth. These are C, F, and G among the seven triads above.

2 Minor Triad

There are three semitones from the tonic to the third; there are seven semitones from the tonic to the fifth. D, E, and A among the seven triads above are. For distinction, it is written Dm-Em-Am.

3 diminished triad

There are four semitones from the tonic to the third and seven semitones from the tonic to the third. This is the B in the seven triads above. Written as B-.

Seventh chords

Since the above seven triads are not enough, adding a third above each triad will make the following seven seventh chords:

Seventh chords

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C7 1 3 5 7

Dm7 2 4 6 1

Em7 3 5 7 2

F7 4 6 1 3

G7 5 7 2 4

Am76 1 3 5

B7 7 2 4 6

Among the seven seventh chords, the note name is ranked fifth The individual tone G, that is, the seventh chord formed by the dominant tone as the tonic, is the most commonly used one among the above-mentioned seventh chords, and it belongs to the seventh chord G7.

Because the four component notes of G7: "5 7 2 4" already include the "5 7 2" of the G chord.

Therefore, in terms of harmony technique, using the three chords of C, F, and G7 for major songs can accompaniment to ordinary simple major songs