Key signatures are super important in music. They tell us which notes will be sharp or flat.

1. What are Key Signatures?

   • In Western music, there are 15 key signatures.
   • Seven of them have sharps, seven have flats, and there’s one key without any sharps or flats (C major or A minor).

2. How Key Signatures Affect Notes:

   • Each major key has seven different notes.
   • For example, in the key of G major, one of the notes is F#.
   • Here’s how keys work:
     • Major scales follow this pattern: Whole, Whole, Half, Whole, Whole, Whole, Half.
     • Minor scales follow this: Whole, Half, Whole, Whole, Half, Whole, Whole.

3. How Musicians Play:

   • When musicians play, they have to change where they place their fingers based on the key signature.
   • This change affects about 70% of how they play.

In short, key signatures tell musicians which notes to play and how to play them. This really changes the sound and feel of a piece of music.