What is the difference and connection between the five-tone mode and the four-tone mode?

Both pentatonic and tetratonic modes are scales, and their differences and connections are mainly reflected in the following aspects:

1. Scale elements: The pentatonic mode contains five tones, namely, Gong, Shang, Jiao, Zheng and Yu, and the mode based on these five tones is called pentatonic mode. The four-tone mode contains four tones, namely, flat tone, rising tone, rising tone and falling tone.

2. Musical expression: The pentatonic style has the characteristics of harmony and stability in musical expression, which is suitable for expressing simple and peaceful musical emotions. The four-tone mode has the characteristics of cadence in language expression, which is suitable for expressing strong and excited emotions.

3. Application field: Five-tone style is one of the essences of China traditional music, which is widely used in China folk music and instrumental music. Four-tone mode is mainly used for reading aloud and singing songs in modern Chinese.

Generally speaking, pentatonic scale and quartic scale are scales, and they are different in scale elements, musical expression and application fields. Although they are different in some aspects, they are all important parts of the music system and are of great significance to music creation and performance.