Sound is a vibration of a body perceived by our ears. However, almost no object vibrates at a single frequency, it is always a mixture of vibrations at different frequencies and intensities (the spectrum, a kind of fingerprint that identifies sound timbre).

This analyzer implements the Fourier transform, an extraordinary mathematical tool used to decompose a wave into its individual components, showing the intensity of each frequency included in the original wave. Fourier transforms form the basis of all audio processing, and are also used in many other areas of mathematics.