The second ordered list we will discuss is all the intervals. This ordered list will help us understand how the intervals change as we ascend or descend in tone. All the intervals we will use are 1,b2, b3, 3, 4, b5, 5, b6, 6, b7, 7 and back to 1. When we play in different keys and modes then the entire ordered list is not used instead a subset of the ordered list of intervals is utilized. There are only 12 intervals for the guitar, though if the fret spacing were changed a different number of intervals in the system might result. The interval perspective, like the note perspective helps us navigate the fret board going up and down it. Intervals help us create an underlying structure that will help with playing the modes and various other scales—while helping reduce the total amount of information.
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