C key: a key consisting of seven basic tones. Its key sign is that there is no elevator sign. C major is a smooth tone, very quiet and solemn. It is suggested by musicians as a symbol of rationality and return to nature. ? D key: Move C key up by a second degree, that is, move G key up by a pure fifth degree, starting from D key, that is, D key. The key signature marks in D are two sharp semitones, #F and # c.
The structure and functional system of tunes
1, Tone and Mode:
A musical system with a fixed pitch is called "tune". This fixed pitch is the tonic. After the musical system of tonic height is determined, according to certain rules and structural requirements, the mode (also known as musical form, and modal structure is musical form structure) is formed, including tonality, melody, rhythm and beat. Mode is the main expression of mode. Modal system is based on the tonic, and other musical tones and structural organizations always develop and develop around the tonic, serving the tonic, stating the musical theme and expressing the musical image.
2. clef and spectrum:
The mode is music recording, which makes music works widely spread and used. One is the common notation, and the other is the staff. The staff includes three kinds (commonly used in instrumental music): treble spectrum, bass spectrum and alto spectrum, and songs are generally recorded by treble spectrum.
The treble clef, the bass clef and the alto clef are recorded in the staff (five parallel and equally spaced lines) to form the treble and bass spectrum tables. Therefore, the staff has practical significance only after the clef is added to form a spectrum table.
3. Key signature, signature:
Write the phonetic symbols on the spectrum, which is called key signature, and key signature usually writes them after the clef; Record the time signature in the spectrum table, indicating the beat and embodying the rhythm law, which is generally written behind key signature. The spectrum table marked with treble clef is called treble spectrum table; The spectrum marked with bass clef is called bass spectrum; The spectrum table marked with alto clef is called alto spectrum table (for example).