Under Kingly K.harapriya, Charulata has indicated the film number 'PACHAI NIRAME' (Rehman hit in Alai paayuthe)as largely based on the raga!
No please, such examples will be grossly misleading the average rasika however hard u justify it!
Once during a programme a few years back at BV bhavan,she listed 'Unnodu vaazhaadha vaazhvenna vaazhvu' another film song under HAMSADHWANI! The scale is just OK only in the first line of the pallavi. The song takes all the filmy freedom thereafter!
It is one thing to say that a tune is loosely based on a certain scale and quite another to say it is based on the raga
. AFAIK Charulatha makes this distinction although she does not pedantically labour on the specifics of the liberties/artistic license employed by film composers. Many songs, especially contemporary numbers are mentioned *in passing*, and are not held up as gold standards for the raga. MKT numbers are typical favourites and usually sung in full.
Bottom-line: Isai Payanam intends to entertain and pique the interest of listeners regarding CM, especially non-kutcheri goers (we have had several listeners calling to enquire where Narada Gana Sabha was located
Certainly, it is NOT INTENDED to train them in the arcane art of Film Raga Spotting, a largely pointless, albeit innocuous and enjoyable activity.
As one poster opines, this is often futile with many new numbers, where the coincidence with a scale is sometimes accidental, with the music director not really conversant or concerned with the intricacies of the carnatic raga!
FYI, here are some presentations of Hamsadhawani from Isai Payanam concerts in London and Melbourne:http://charulathamani.com/download/hamsadwani-london2009.mp3http://charulathamani.com/download/hamsadhwani-melbourne2010.mp3