Intervals on the Guitar
An interval is the relationship between any two tones. Sometimes it is defined as the distance between tones, & that is one dimension to what they are. Yet, intervals are also the sounding relationships, or interactions, between any two tones. We can identify them with our ear by how they resonate.
Open String Intervals
The open strings in standard tuning have these intervals between the strings. If closed, they are the same. And interval types can also be described in half steps.
From a 6th String Root
The black dot is any root [the lower down the string the root is located, the nut cuts off some the possibilities – this is true for any string].
5th String Root
The interval shapes and relationships from the 5 string are the same as string 6. Makes sense…since the intervals between the strings are the same, the shapes are as well.