The scales of Madhuvanti are as follows:
Aarohanam (Ascending) : S G2 M2 P N3 S’
Avarohanam (Descending) : S’ N3 D2 P M2 G2 R2 S
It is a Janya raga, derived from Dharmavati, which is 59th on the Melakarta scheme.
This raga is Hindustani in origin. Madhu means honey, and likewise it is is sweet and romantic. It is a light raga, used for tukkadas in Carnatic Music, which are short and light pieces sung towards the end of the concert. There is a lovely Thillana by Lalgudi Jayaraman in this raga. Also the song Sarvam Brahmamayamis often rendered in this raga.
Note : The 12 notes in the octave are named as below. Please note that C is used as Sa for the sake of simplicity as the scale is relative in Carnatic Music. Also note that the scales paint only a superficial picture of the raga as the gamakas(ornamentations) are a very important part of a raga.