Chromagram

Ok kiddo, so you know how we have different colors like red, blue, green, and yellow? Well, in music, we also have different colors or tones, and we call them pitches.
Now, let's imagine we have a song that is playing. If we wanted to understand which colors or pitches are being used in that song, we could use something called a chromagram.
A chromagram takes all the different pitches that are being used in the song and puts them into different buckets. Think of it like sorting candy into different jars - all the red candy goes in one jar, all the blue candy goes in another jar, and so on.
But instead of colors, a chromagram puts the pitches into different buckets based on their relationship to the notes in the musical scale. For example, notes that are in the same key or sound good together will go in the same bucket, and notes that don't sound good together will go in different buckets.
By using a chromagram, we can see which pitches are used the most in the song and how they are combined to make different melodies and harmonies. It's like looking at a musical rainbow!