Pitch class

Okay kiddo, let's talk about something called "pitch class." Do you know what music is? It's when we make sounds that are pleasing to hear, and we can use different instruments like a piano or a guitar to make those sounds.

Now, in music, there are different notes that we use to make those sounds. Each note has a different name, like A or B or C. But sometimes, we want to talk about a group of notes that sound similar to each other. That's where "pitch class" comes in.

A "pitch class" is like a team of notes. It includes all the notes that sound the same, but at different heights or "pitches." So, for example, the pitch class of C includes all the notes that sound like C, whether they are high or low.

But here's where it gets a little tricky. Sometimes we talk about notes that sound the same, but have different names. For example, there's a note called C-sharp, which sounds a little bit higher than plain old C. But even though they have different names, they are still part of the same pitch class because they sound similar.

So when we talk about pitch class, we're talking about a group of notes that sound similar to each other, even if they have different names or pitches. It helps us understand how different notes relate to each other in music, kind of like how different colors can be part of the same group, like red and pink and orange.