In general, if any major, minor, or perfect interval is expanded by a half step by changing an accidental (the flat or sharp indication on the note) the resultant interval is called augmented, and if it is reduced by a half step by changing an accidental, the resultant interval is called diminished.
(any major, minor, or perfect interval; is expanded; by a half step by changing an accidental (the flat or sharp indication on the note) (the resultant interval; is called; diminished) (the resultant interval; is called; augmented) (the resultant interval; diminished; ) (the resultant interval; augmented; ) (it; is reduced; by a half step by changing an accidental)
any major, minor, or perfect interval the resultant interval the resultant interval the resultant interval the resultant interval it
is expanded is called is called diminished augmented is reduced
by a half step by changing an accidental (the flat or sharp indication on the note
diminished
augmented
by a half step by changing an accidental