Changes

All 2nds, 3rds, 6ths and 7ths are either major or minor. We use the term perfect to describe intervals of the unison, [[octave]], 4th and 5th values. If a major interval is chromatically increased by a semitone it becomes [[augmented]]. For example, C to A is a major [[sixth]], but C to A# is referred as an augmented sixth. If a minor interval is reduced by one semitone it is said to be [[diminished]]. For example, G to Bb is a minor third, but G# to Bb is a diminished third. By adding or subtracting a semitone, perfect intervals can be made augmented or diminished.

All 2nds, 3rds, 6ths and 7ths are either major or minor. We use the term perfect to describe intervals of the unison, [[octave]], 4th and 5th values. If a major interval is chromatically increased by a semitone it becomes [[augmented]]. For example, C to A is a major [[sixth]], but C to A# is referred as an augmented sixth. If a minor interval is reduced by one semitone it is said to be [[diminished]]. For example, G to Bb is a minor third, but G# to Bb is a diminished third. By adding or subtracting a semitone, perfect intervals can be made augmented or diminished.

Any interval of more than an octave is known as a compound interval - 9th, 10th, 11th, etc.

Any interval of more than an octave is known as a compound interval - 9th, 10th, 11th, etc.