ELI5: Explain Like I'm 5

Harmonic analysis

Harmonic analysis is like looking at a cake and figuring out how much flour, sugar, eggs, and other ingredients went into making it taste yummy. But instead of a cake, we are looking at music or sound.

When we listen to music or sound, we can hear different parts, like the melody (the tune we sing along to) and the rhythm (the beat that makes us want to dance). In harmonic analysis, we look at all the different sounds that make up the music, just like we look at all the ingredients that make up a cake.

We use special tools called Fourier transforms to break down the sound into its individual parts, or harmonics. Imagine taking a crayon and drawing a line that goes up and down. This line represents the sound we hear. Now, if we take that line and break it into smaller lines of different lengths that fit neatly in between each other, we get the individual harmonics that make up the sound. Just like how we can break up a cake into flour, sugar, and eggs.

By studying the different harmonics of a sound, we can learn about its structure, texture, and tonality. We can also figure out why certain combinations of sounds make us feel different emotions, like happy or sad.

So, just like how we can make a yummy cake by combining different ingredients in the right way, we can create beautiful music by combining different sounds and harmonics in the right way. Harmonic analysis helps us understand how to create great music and appreciate the complexity of the sounds we hear.