The most complete and simple 100 pieces of music theory knowledge to help you easily open door of music.

1. Clef is a character used to indicate name and pitch of a staff.

2. Staff - Add a clef to staff.

3. There are four types of sound: pitch, timbre, sound intensity and sound volume.

4. Sound is divided into music and noise.

5. The sum of fundamental tones used in music is called music system.

6. Each tone in musical tone system is called a tone level.

7. Arrange tones in musical tone system according to a certain pitch ratio and order called sound column.

8. The names of each tone level in musical tone system are called note names.

9. Do, re, mi, fa, sol, la and si used for singing are called roll call .

10. The sound level, named after seven letters CDEFGAB, is called basic sound level.

11. The sound produced by raising or lowering main sound level is called changing sound level.

12. To distinguish between sounds with same name but different pitches, resulting groups are called sound groups.

13.Standard pronunciation is a group of small characters, a1=440

14. The absolutely exact pitch of each tone in system of musical tones and their ratio is called Temperament.

The law of twelve equals, law of five degrees of mutual generation, and law of purity are common.

15. Consonance is same pitch, but a different designation and meaning.

16. A semitone consisting of two adjacent fundamental tone levels and varying tone levels of these two fundamental tone levels is called a natural semitone.

A solid tone consisting of two adjacent fundamental sound levels and varying sound levels of those two basic sound levels is called a natural solid tone.

A semitone that consists of a certain level of root and its variation level is called a variation semitone.

The whole tone, consisting of two basic tone levels separated by a basic tone level and its variation level, is called a variant whole tone.

17. Two whole notes, whole notes, half notes, quarter notes, eighth notes, sixteenth notes, thirty-second notes, etc. are called base notes.

18. A small dot is added to right of main note, which is a dotted note.

19. The small dot to right of root note is a dot that doubles time of previous root note.

20. The signs used to indicate an increase or decrease in sound level are calleddiacritics and there are five types.

21. The regular alternation of strength and weakness is called rhythm.

22. One strong and one weak cycle is repeated, which is bit.

23. Rhythm is typical rhythm of music.

24. Each beat time segment is called a single beat.

25. The unit of measure is represented by a fixed note, which is a beat.

26. The time signature is called time signature.

27. The section between one downbeat and next downbeat is called measure.

28. The music starts with weak part of bar, which is called weaker, and weaker bar is called weak bar.

29. Single time signature is a time signature consisting of only two or three beats per measure.

20. A beat consisting of equal single beats is called a multiple beat.

31. A combination of different types of beats with same value of time unit of beats combined in a different order is called a mixed beat.

32. Different beats appear alternately in music, called changing beats.

33. Several different beats are played alternately, which are called alternating beats.

34. Scattered beats, also known as scattered beats, free beats, do not have a clear timing and a strong or weak position of a single beat.

35. Combining notes of different durations according to structural features of measure is called method of combining sound value.

36. The sound on a weak beat or weak position continues to next strong beat or strong position, violating law of strength and weakness of original rhythm of beat. This sound changes from weak to strong, which is called Syncoping.

37. Divide root note into three equal parts to replace two parts of root. This is a triol.

Fives, sextuples and sextuples replace four parts, and nineteen to fifteen parts replace eight parts.

Doubles replace three parts, and fours also replace three parts.

38. In a musical tonal system, ratio of high and low frequencies between two tones is called interval.

39. The two tones in an interval are pronounced sequentially as a melodic interval and simultaneously pronounced as a harmonic interval.

40.Degree is number of lines occupied by two tones in a staff interval.

41.Number of tones is number of full tones and semitones contained in two tones of interval.

42. Pure intervals, large and small intervals, increase four and subtract five intervalscatches are natural intervals.

43. Except for incrementing four and subtracting five, all intervals are change intervals.

44. Minus one degree does not exist.

45. Intervals within an octave are single intervals and above are multiple intervals.

46. Pure octave: extremely full harmony.

Pure Four Pure Five: Perfect harmony.

Size three, size six: incomplete consonance.

All other intervals are dissonant.

47. The upper and lower sounds of an interval are reversed, which is called an interval inversion.

48. Intervals with different designations and meanings, but with same sound effect, are called "strongly" equal intervals.

49. In accordance with relations of third degree or interval relations other than third degree, combination of more than three tones is called a chord.

50. A chord formed by three tones that can be superimposed on each other in accordance with ratio of three-step interval is called a triad.

51. Consists of four tones that can be superimposed on each other in accordance with ratio of thirds. This chord is called a seventh chord.

52. Chords with third, fifth, and seventh notes of chord as bass are called inverted chords.

53. Chords with different notations and meanings, but with same sound effect, are called "strong" and other chords.

54. Major and minor chords are consonants, augmented triads, diminished triads and all seventh chords are dissonant chords.

55. Tuning means tuning up, which refers to pitch position of tonic.

56. A tone composed of seven fundamental tones is called a root.

57.Key is character that represents pitch of tonic.

58. The sharp sign means sharp tone, and flat sign means even tone.

59. Arrange tones in a pure fifth, which is called cycle of quints.

60. All tones in two tones are equal to each other, and these two tones are equal tones.

61. Several tones are combined according to a certain ratio, forming a system, which is mode.

62. A combination of harmony and scale, commonly referred to as tonality.

63. The structure of scale is "full half, whole, whole half", and triad formed on tonic is a major triad, which is natural major scale.

64. The sixth level of natural major scale is harmonic majorth way.

65. When natural major scale is lowered, sixth level is lowered and seventh level becomes melodic major.

66. Each sound level in a mode is called a mode sound level.

67. The names of tone levels of mode are: tonic, upper tonic, middle tone, subordinate tone, dominant tone, lower middle tone and leading tone.

68. The first, fourth and fifth degrees of mode are called orthophonic degrees, and second, third, sixth and seventh degrees are called consonant degrees.

69. Levels 1, 3, and 5 are stable, while rest are unstable.

70. The scale structure is "full, half whole, half whole", and triad formed on tonic is a minor triad, which is natural minor scale.

82. The mode with same tonic is called same tonic. Major and minor scales with same tonic are restricted to major and minor scales, but same tonic is not restricted.

83. The combination of interval and mode is called interval in mode.

84. In natural major, all intervals are natural intervals.

85. Characteristic intervals in harmonic major and minor scales refer to: an augmented second, a diminished seventh, an augmented fifth, a diminished fourth.

86. An interval consisting of stable audio levels is called a stable interval, and an interval including unstable audio levels is called an unstable interval.

87. To solve an unstable interval, one must move unstable sound into a stable sound and avoid parallel octaves and parallel fifths.

88.The dissonant interval becomes a consonant interval, which is called resolution of dissonant interval.

89. The combination of a chord and a mode is called a chord in a mode.

90. After raising or lowering any natural sound level in fret scale, sound with random marks formed is a mode change.

91. Inserting an upper or lower second tone between two tones of same pitch is called a auxiliary tone.

92. A passing tone is a tone inserted between two tones of different pitches.

93. Neither natural auxiliary sound nor natural transmitted sound belongs to modal inflection, but changing auxiliary sound and changing transmitted sound belong to modal inflection.

94. The relationship between tunes is called Tune Relationship.

95. Tones that differ in one ascending and descending sign are called near-relative tones, and rest are called far-relative tones.

96. The transition from one melody to another or from one mode to another is called modulation.

97. A scale consisting of twelve semitones is called a chromatic scale.

98. Basic chromatic scale:

(1) When ascending between larger second steps, natural tone level rises to fill semitone, instead of raising sixth level, instead only lowering seventh level.

(2) In downward direction, natural tone level is lowered to fill semitone between larger second stops, and lower level should not lower fifth level but raise fourth level.

99. Minor chromatic scale:

(1) Both rising and falling natural tone levels are used to fill semitone between major second, and only second level falls between first level and second level.

100. Transposing an entire piece of music or a part of it from one key to another without any change is called transposition.