Roman numeral code: + after a chord designation, such as I+ or I+
Scale notes: 1, 3, #5 (1+)
Mode: Augmented
Attributes: ethereal, reaching upward, inspiring
Augmented 1 (written '1 +') is another way of transitioning from 1 to 2, 4 or 6.
The cadence 5 -> 5+ -> 1 is very unusual and effective.
