# what's the name of the interval A (V degree) and D# in a e minor scale?

I guess it's an augemented fourth because it contains a half step more than a perfect fourth; [from a source] but in a minor scale it isn't allowed: an augmented fourth is IV degree.

• Interval naming has nothing to do with scales. It can be convenient to think of interval names in terms of the Major scale, but interval names are only about the distance between note names.
– user39614
Mar 1, 2018 at 2:10
• – user39614
Mar 1, 2018 at 2:32
• Another possible duplicate
– user39614
Mar 1, 2018 at 2:36
• @David Bowling - Would 'interval numbers are about the distance between note names' be more accurate?
– Tim
Mar 1, 2018 at 9:02
• @Tim -- probably. Maybe 'interval names are are about distance and can be found by using the distance between note names and the distance between notes in semitones together in combination.' It seems difficult to capture an accurate description in a single sentence.
– user39614
Mar 1, 2018 at 13:49

Any A to any D is some kind of 4th since the distance in letter names is that of a 4th. Since A to D is a perfect 4th, making the interval bigger by one semitone from A to D♯ makes this interval an augmented 4th.