The common basic expression elements in music include rhythm, melody, harmony, tonality, timbre, dynamics, ornamentation, movement, musical structure, etc.

1. Rhythm

Rhythm is one of the most basic elements in music. It creates the rhythm of music through the allocation and organization of time. Rhythm can be fast or slow, or regular or irregular.

2. Melody

Melody is composed of a series of organized notes. It is the easiest part to recognize and remember in music. Melody can be ups and downs, continuous, repetitive, etc.

3. Harmony

Harmony is a musical effect formed by multiple parts or instruments playing at the same time. Harmony can be harmonious or dissonant, and can enhance the expressiveness of the melody and the richness of the music.

4. Tonality

Tonality is an important concept in music. It refers to the organization of pitches and intervals in music. The key can be the main key or the secondary key. By changing the key, the emotion and atmosphere of the music can be changed.

5. Timbre

Timbre is the texture and characteristics of different instruments or sounds in music. Different instruments and sounds can give people different feelings and impressions, and timbre is also an important means of expressing emotions and creating beauty in music.

6. Dynamics

Dynamics is the change and control of volume in music. Music can have strong, soft, crescendo and diminutive dynamic changes, and the tension and emotion of music can be expressed through dynamics.

7. Ornamentation

Ornamentation is a note used to decorate the melody and enrich the music. It can be vibrato, portamento, vibrato, etc. Decorations can add variety and expressiveness to music.

8. Movement

Movement is the movement and change between notes and instruments in music. Movement can be smooth and continuous, or jumpy and discontinuous. Movement can bring a sense of rhythm and dynamics to people.

9. Music structure

Music structure is the organization and relationship of various parts in music. Musical structure can be repeated and changed, which can bring a sense of familiarity and freshness to people.