The first ordered list we will discuss is all the notes. This ordered list will help us understand how the notes change as we ascend or descend in tone. All the notes we will use are A, A#/Bb. B, C, C#/Db, D, D#/Eb, E, F, F#/Gb, G, G#/Ab, and back to A. When we play in different keys and modes then the entire ordered list is not used instead a subset of the ordered list of notes is utilized. The / denotes that the note in reference can be seen as either a # or a b (flat), depending on the key and mode in reference. Thus sometimes we might be saying D#, and at other times calling the exact same note Eb. There are only 12 notes for the guitar, though if the fret spacing were changed a different number of notes in the system might result.
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