This document summarizes the basics of musical notes. It explains that there are 7 natural notes (A, B, C, D, E, F, G) that form the foundation of musical language. It also describes the 5 additional notes that use sharps or flats (A#, Bb, etc.) and how these notes are positioned between the natural notes on the note circle. Finally, it defines semitones as the distance between adjacent notes, and tones as two semitones, or whole steps on the note circle.