Rock

Rock music is a genre in the field of music. It emerged in the 1960s, gradually developed in the 1970s, and entered its heyday in the 1980s. At present, rock music is quite popular in many developed countries in the world. It is a natural product of social development in the field of music.

People living in the world, especially in a fast-paced society, will be subject to pressure from all aspects, such as money, emotions, environment, etc., so people are looking for a To seek relief and an opportunity to vent, a kind of rock music with intense rhythm and strong emotions came into being.

1 The composition of a rock band

Singer: It is the main melody part, he expresses the theme of the music.

Keyboard instrument: It is the submelody part, which is responsible for rendering the theme of the music and acting as a foil.

Guitar: It is the main melody part and the harmony part.

Bass: It is a rhythm sound style.

Percussion (drums, cymbals): making rhythm patterns

2 Characteristics of rock music

Characteristics of music: large volume, strong rhythm, large dynamics .

The interpretation of society: embodies life, faith, spirit and strength.

Means of performance: using a powerful electroacoustic system.

Characteristics of sound: intense emotion, high sound field and sound pressure level, up to 80-100dB

3 Classification of rock music

Heavy metal music: L loudness Powerful and deafening

Hard rock music: with hard songs as the main singing style.

Light rock music: lyrical rock is the main singing style

In addition, there are urban folk songs, country folk songs, punk music, and howling music

4 Rock Music requirements for sound systems

(1) High power and high dynamics. Since rock music is loud, the dynamic range is large, so the power required is also large. Its power is generally more than 10 times that of ordinary speakers.

(2) Use electronic frequency division and subwoofer. Because the human ear is not sensitive to low-frequency sounds, low-frequency sounds should have strong loudness, which requires a special subwoofer and a high-power amplifier to drive the bass box. This bass signal is generated by an electronic crossover. supply.

(3) Use a dispersed sound field, which has very little unevenness. When setting up L and R main speakers in the music scene, it is also required to install auxiliary speakers in the rear area of ??the auditorium to reduce the lack of loudness in the rear area and make the unevenness of the sound field very small.

(4) Use suspended speakers to reduce the loss of sound power amplifier function. The sound waves radiated by speakers installed to reduce low-position speakers are absorbed by people's clothes, hair and other strong sound-absorbing materials, resulting in the phenomenon of "grazing sound absorption". If the speakers are hoisted in the air, the sound waves can be directly radiated in the wide auditorium area, thereby reducing the loss of mid- and high-frequency electrical power.

Blues refers to a fixed harmony progression, a 12-bar structure, and just a few harmonies. His origins also come solely from black people.

Blues music is a music style created by black people living in the United States during their difficult lives. It originated in the delta area of ??the Mississippi River and originated in the early 20th century as a labor chant for people working in the early days. Blues was originally mainly a narration of human voices, and later added instrumental accompaniment. It has made considerable contributions to jazz, rock music, country music and Western music.

The formation of Blues

In the 1920s, Blues gradually emerged with its unique lyrics, harmonious rhythms and melancholic melodies. Blues music contains a lot of poetic language that is repeated over and over again, and then ends with a decisive line. The progression of the melody is based on chords, with three chords of I, IV, and V as the main chords, and a 12-bar pattern is repeated. In the melody, the 3rd, 5th, and 7th notes on the main key are lowered by a semitone, giving people a bittersweet and sentimental feeling.

Although the lead singer is the focus in Blues music, the improvisation of the instruments is also very exciting.

The instrumentalist is free to go beyond the boundaries of chords, and in addition to the melancholic beauty of the melody, there are also the sounds of a knife scraping and a slide being used, and a humming imitating the lead singer's voice.

Country Blues

The earliest blues were called country or delta blues, which originated from the country folk of the South in the 19th century. Especially after liberation, touring singers, guitarists, and harmonica players began to consciously develop this music and incorporated the sorrow of love, freedom, sex, and life into Blues music. Important early musicians include Charlie Patton, Son House (who invented the slide) and Robert Johnson.

Classical Blues

When black people in the United States moved to cities like Memphis and New Orleans to work, Blues gradually turned into a greater urbanization phenomenon. Blues that enters the city is usually performed by male or female singers accompanied by piano or jazz bands. Blues' reputation is growing. Soon, some record producers began to publish works for blues singers, such as W.C. Handy’s "St. Louis Blues" in 1914 and Mamie Smith in 1920. "Crazy Blues". With the development of blues music, jazz and pop music also began to borrow its melodies and gained a large audience.

Electronic Blues

After World War II, the center of Blues has moved to cities like Chicago, where many famous musicians gathered. At that time, B.B. King and Buddy Guy tried to use amplified electric guitars and magnetic drums to enhance the sound. In the 1950s, this style was recognized by many white musicians. More than ten years later, Eric Clapton continues to carry forward Blues music. At the same time, R&B also gradually emerged and was accepted by white musicians, such as Elvis Presley and Bill Haley, who brought R&B into rock music. The famous British bands Rolling Stong and Led Zeppelin also started from blues music, and then gradually moved into heavy metal rock music.

Blues music has developed to this day and has gradually been included in the ranks of mainstream music, and many of its elements are being used more in rock and pop music. But traditional Blues music still has strong strength. Musicians in this field include John Lee Hooker, Etta Baker, Junior Wells and Buddy Guy.