## Expanding Major Interval Music Theory to Minors

The names of intervals are stated in such terms as a second, third, fourth, fifth, and continue up to fifteenths as was stated in the Music Theory of Intervals.

Take a quick review of the Major Intervals

### Making the Interval Minor

The 2nd, 3rd, 5th, 6th, and 7th can all be made minors by stepping down a half step.

Therefore you can get a minor 2nd, a minor 3rd, and a minor 6th.

However, the 5th when made flat is typically called a tritone or a flat 5, and not very often referred to as a minor 5th, but more often as a diminished 5th.

The 7th when made flat is called a dominate 7th, which will be come more clear when we study chord structure. It is sometimes referred to as a minor 7th.

Notice that we didn’t call the 4th a minor. On the scale structure when a fourth is made flat it is a major 3rd. Some will argue that it is possible to have a minor 4th.

Technically, it might be applied when you have a minor 3rd and a minor 4th. Since this is a bit obscure at this point just stick with the the others.

Most often in relating to the 4th we migh augment it or raise it a half step. It would be a sharp 4 (#4).  And that is the same note as the flat 5.

### Working with the Minor Intervals

If we take our major intervals and flat or raise them as discussed above the new ones become the m2nd, m3rd, +4th, dim5th, m6th, and a dom7th.

The following measure shows the minor intervals for the C octave.

Here are the rules for finding minor intervals.

 Interval Example Label Minor Second  (1 half step) C to Db m2 Minor Third (3 half steps) C to Eb m3 Augmented Fourth (6 half steps) C to F# +4 Diminished Fifth (6 half steps) C to Gb dim5 Minor Sixth (8 half steps) C to Ab m6 (dominant) Seventh* (10 half steps) C to Bb 7

*The dominate Seventh is shown as just 7 referred to as minor 7 and dominate 7th.

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