Okay kiddo, let me explain gamut in music to you. Imagine you have a big box of crayons with lots of different colors. Every time you want to make a drawing, you choose some of those crayons to use. That box of crayons has a gamut, which is just a fancy word for how many different colors are in the box.
In music, gamut means basically the same thing, but instead of colors, we're talking about the range of notes that a piece of music uses. It's like a musical crayon box. Just like you can mix and match different colors to make different drawings, musicians can mix and match different notes to make different melodies and harmonies.
Different kinds of music use different gamuts. Some kinds of music, like jazz or blues, might use a lot of different notes and have a really wide gamut. Other kinds of music, like folk or pop, might use a more limited range of notes and have a narrower gamut.
The gamut of a piece of music can also affect how it makes you feel. Some music might use really high or really low notes to create a sense of tension or excitement, or might use certain combinations of notes to create a feeling of sadness or happiness.
So there you have it, kiddo! Gamut means the range of notes that a piece of music uses, just like a box of crayons has a range of colors.