In music, the audio frequency range refers to the range of frequencies that can be heard by humans, typically between 20 Hz and 20,000 Hz (20 kHz). This range is often divided into several frequency bands or octaves, each of which has its own characteristics and importance in music production.

The lowest frequency band in the audio frequency range is the bass range, which typically covers frequencies from 20 Hz to 250 Hz. This range is important for defining the low end of a mix and creating a sense of depth and power in music.

The midrange covers frequencies from 250 Hz to 4 kHz and is considered the most important frequency range for defining the character and tone of a sound. The midrange is where most of the important harmonic content of a sound is found, making it crucial for creating clear and balanced mixes.

The high-frequency range covers frequencies from 4 kHz to 20 kHz and is important for adding brightness, airiness, and detail to music. This range is often associated with the sound of cymbals, hi-hats, and other high-pitched percussion instruments.

In music production, understanding the frequency range and the importance of each frequency band is crucial for creating a well-balanced and professional-sounding mix. Proper equalization (EQ) is used to shape the frequency content of individual tracks and the overall mix to achieve a desired sound.