Carnatic music is traditionally taught according to the system formulated by Purandara Dasa
So Why It is Fixed To mayamalavaGowla And not to other Raaga because
The notes in this raga are shuddha rishabham, antara gandharam, shuddha madhyamam, shuddha dhaivatam and kakali nishadam....
The gamakas in the raga are unique in that conversely to the G-M relationship in Sankarabharanam, G is sung in oscillation (M,G M,G M,G) while M is held constant. There is no bold M-P gamaka as in Sankarabharanam as well. R and D are also usually sung in oscillation with S and P respectively, making the only constant notes S, M, and P.
So When We Sings The Suddha Rishabham and also suddha daivatha It gives good vibration to our body(positive vibration and test ur self)... And also it come from our stomach(Nabhi nundi).... It Is Very easy Raaga to learn at starting stage..... So At starting Stage Students are not sung Gamakas in proficient manner..... This Raaga Will Give A Good Picture About All The raagas(i.e.All Melakartas)...It has a uniform distance between svara sthanas (relative position of notes) and has symmetry, they are easier to learn....
This auspicious raga evokes santa( peace) rasa and pathos. It creates a soothing effect.... The main policy of our culutre is to promote Peace.....
So All TheBasics LikeSaraliswarams, Jantaswarams,Alankarams,Etc.. should taught in This Raaga only..
No other raaga Should Not Contain This Type of features.... For example Sankarabharanam, kharaharapriya,kalyani, etc The distances are not equal from one swara to other swara... It is the Major advantage to this Raaga
Sa re (same distance) Ga ma (same distance) like Pa da And ne sa.........
Finally Conclude that No doubt raaga Mayamalava Gowla is apt for Basic Training Raaga for Music (not only in Carnatic But also in all types od music).........
HEMADRI CHANDRAKANTH