Music theory, referred to as "music theory", includes relatively simple basic theories-reading music, intervals, chords, rhythm, beats, etc. Follow my steps to learn about the relevant introduction of music theory!

The production of music theory

Music is a physical phenomenon. When an object vibrates, it produces sound waves, which travel through the air to people's eardrums and are reflected by the brain and perceived as sound. The sound that people can hear vibrates about 20-20,000 times per second. In nature, our human hearing can sense many sounds, but not all sounds can be used as music materials. The tones (excluding overtones) used in music are generally limited to the range of 27-4100 vibrations per second. That is to say, the sounds mentioned in music are selected by people in their long-term life practice, can express people's lives or thoughts and feelings, and form a fixed system to express musical ideas and shape musical images. The properties of music theory

Mainly include the pitch of the sound, the strength of the sound, the length of the sound and the timbre.

There are four main properties of sound: pitch, strength, length, and timbre. They are very important in musical performance, among which the pitch and length of the sound are the most important. I don’t know if you have this experience: for a song, no matter whether you sing it with a human voice or play an instrument, whether the voice is small or loud, and no matter what key you use when singing or playing, the strength and timbre of the sound will be different. Changes, but the melody of the song remains the same. However, if the pitch or length of the sound of the song changes, the experience of the music will be seriously affected. It can be seen that for a melody, the importance of pitch and sound length.

The pitch of the sound is determined by the number of vibrations (frequency) of the object in a certain period of time. The more vibrations, the higher the sound; the fewer vibrations, the lower the sound. The intensity of the sound is determined by the amplitude (the amplitude of the vibration of the sound waveform). The larger the amplitude, the stronger the sound; conversely, the smaller the amplitude, the weaker the sound. The length of the sound depends on the duration of the sound. The longer the duration of the sound, the longer the sound; the shorter the duration of the sound, the shorter the sound. The timbre is determined by many factors such as the nature, shape and number of overtones of the pronunciation body.

Timbre refers to the sensory characteristics of sound. It is an important expression method in music that is extremely attractive and can directly touch the senses. The vibration of the sound body is composed of a variety of harmonics, including fundamental tones and overtones. The number of overtones and the relative intensity between overtones determine a specific timbre. People's ability to distinguish timbre is innate, and timbre is divided into vocal timbre and instrumental timbre. The timbres of human voices are high, medium and low, and are divided into male and female; the timbres of instrumental music are mainly divided into string instruments and wind instruments, and the timbres of various percussion instruments are also different. Sound and pitch of music theory

Sound is produced due to the vibration of objects. There are many sounds in nature that can be felt by our human hearing, but not all sounds can be used as music materials. The sounds used in music are specially selected by people in order to express their lives, thoughts and feelings during the long-term production struggle and class struggle. These sounds are composed into a fixed system to express musical ideas and shape musical images.

Sound has four properties: pitch, strength, length, and timbre.

The pitch of the sound is determined by the number of times (frequency) the object vibrates within a certain period of time. The more vibrations, the higher the sound; the less vibrations, the lower the sound.

The length of the sound is determined by the difference in duration of the sound. If the duration of the sound is long, the sound will be long; if the duration of the sound is short, the sound will be short.

The intensity of a sound is determined by the amplitude (the amplitude of the vibration range of the sound). If the amplitude is large, the sound will be strong; if the amplitude is small, the sound will be weak.

The timbre is different due to the nature and shape of the pronunciation body and the number of overtones.

The above four properties of sound are all very important in musical performance, but the pitch and length of the sound are of even greater significance. Take the song "Socialism is Good" as an example. No matter you sing it with a human voice or play it with an instrument, sing it quietly or sing it loudly, although the intensity and timbre of the sound have changed, it is still easy to identify. This melody. However, if the pitch or value of the song is changed, the musical image will be seriously damaged immediately. Therefore, whether creating, playing or singing, special attention should be paid to pitch and value. Due to the regularity and irregularity of the vibration state of sound, sound is divided into two categories: musical sound and noise. Music is mainly used in musical sounds, but noise is also an indispensable component of musical performance.