it  is  enough  if  CM  uses  18  MK  janaka ragams. and  adopt  the  HM notation. 

   These  18  melakartha  scales  account  for  nearly  200  janyaragams  commonly  come across  in CM  songs  and  concerts.

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In  a separate  web-page,  we  will  try  to  see  the  janya  ragams  of  the  non-vivadhi  scales(32)  and  some  vivadhi (40) but  unmusical  scales

(14) ..pretty few!

here  is a nice  set  of  replies  from quora

Which melakarta raga is sung rarely in carnatic music concerts?

Reman Krishnan, An experienced Carnatic Music Listener.

Updated Jan 31, 2016

There are many ragas in carnatic music,that are rarely sung in concerts.I would mention some melakarta ragas here,even though there are many more.

1.Tanarupi

Eventhough it is a 6th melakarta raga,it has just two kritis in it.The raga and the kritis are rarely sung in concerts.The raga also sounds quite awkward with the presence of D3,N3,R1 and G1.

2.Vakulabharanam

It is 14 th Melakarta raga and this raga is the carnatic equivalent of Basanth Mukhari in Hindustani music,but is seldom sung in carnatic concerts.This raga has about six krithis in it,but none are popular except Eramuni by Saint Tyagaraja  which is sung in some rare concerts.This raga evokes the feeling of sympathy and sadness and is a very powerful raga too.It is often mistaken with one of its popular janya ragas-Ahiri.

3.Sucharitra

This raga too has just two krithis in it,and is rarely sung in concerts.It too has an awkward scale containing R3,G3,M2,D1 and N1 in it.Velum mayilume -is a Koteeswara Iyer Kriti that is popular in this raga.

There are atleast 10 melaragas that should be specified,but ending with just 3!

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Revanth Voothaluru, Teacher, Art Lover, Movie Buff, Foodie

Answered Jul 17, 2016

The mela raagas you get to hear often in concerts are:

1)Todi

2), Mayamalavagowla,

3)Chakravakam,

4)Natabhairavi,

5)Keeravani

6), Kharaharapriya,

7)Gowrimanohari,

8)Charukesi,

9)Harikhamboji

10), Shankarabharanam,

11)Shubhapanthuvarali

12), Panthuvarali,

13)Ramapriya,

14)Shanmukhapriya,

15)Simhendramadhyamam,

16)Hemavati

17), Dharmavati,

18)Latangi,

19)Vachaspati and

20)Kalyani

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Ragas you may get to hear once in a while, thanks to the compositions of

Tyagaraja and Koteeswarayar, there is at least one song in each of this raga that you can hear once in a while in concerts.

1)Ganamurthi

2), Vanaspati,

3)Manavati,

4)Dhenuka,

5)Kokilapriya,

6)Natakapriya,

7)Vakulabharanam,

8)Suryakantham,

9)Sarasangi,

10)Vagadheeshwari,

11)Gangeyabhooshani,

12)Chalanata,

13)Bhavapriya,

14)Gamanashrama,

15)Kantamani,

16) Rishabhapriya,

17) Jyotiswaroopini and

18) Nasikabhooshani ‘

The rest of them are very rarely heard in concerts.

hat

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RSR...( prepared  on 16-3-2018)

Out  of  72  Melakartha ragams,  40  scales  are  VIVADI

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NON-VIVADI  ARE

M1: ( 8-11 ), ( 14-17), ( 20-23 ) and (26-29 )

M2: ( 44-47), ( 50-53 ), ( 56-59) and (62-65)

Therefore,  only  32  scales  obey  the  rule.

HM  has  used  10  of  these  32  scales.