Intervals

Interval - distance between two notes.

Generic Intervals
C to C are firsts; C to D are seconds; C to E are thirds (they'll also play on the same staff position); C to F are fourths; C to G are fifths; C to A are sixths; C to B are sevenths; C to C are eights.

Specific Intervals
A major second is made up of two half steps.

Major third is made up of four half steps.

Perfect fourth is made up of five half steps.

Perfect fifth is made up of 7 half steps.

Major sixth - 9 half steps

Major 7th - 11 half steps.

Perfect 8th - 12 half steps.

Major 9th - 14

Major 10th - 16

Major 11th - 17

Perfect 12th - 19

Major 13th -

Major 14th

Double Octave - 24 half steps

A minor is a half step lower than a major. There's only second, third, sixth, 7th, 9th, 10th, 11th, 13th, and 14th minor.

Augmented intervals is one half step higher than a perfect interval.

A diminished interval is one less half step than a perfect interval.