ocr: ABUUT MUSIC NUTATIUN An octave is a series of twelve notes. These twelve notes are the building blocks of music. Each note is separated from the next note by a half step. The series of notes repeats itself in each octave. The notes share the names of their neighbors. Each note can be expressed by using its neighbor's name and indicating that it is played one or two steps up or down from the neighbor. The notes use 7 letters tor represent them in this way. Why 7 letters to represent 12 notes? The best answer I have heard is that usually 7 notes are mainly used ina a musical piece and the other ...