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https://youtu.be/j3anzRfylCk

Who is the female singer here? https://youtu.be/RlL50wJQJT8

See http://scroll.in/article/737022/how-tamil-films-took-carnatic-music-to-mass-audiences-and-threw-in-a-few-social-messages-too

Periyanayaki concert from Sabapathy mentioned at the very beginning seems to have disappeared from YouTube but it is still available here...

From 1939 https://www.youtube.com/watch?t=21&v=_o6vqjAzGgc

http://youtu.be/HrYDS9w61AU

https://www.youtube.com/watch?v=VRg1H1BZVOk

https://www.youtube.com/watch?v=ALcUUfEi-hA

The above is wrong. Seems to be 1959.

1941? https://www.youtube.com/watch?v=pRqbvtWTOLI

http://www.upperstall.com/films/2013/an-american-madras

http://www.youtube.com/watch?v=AzS17GLOPBU

Rajraj,
It is still there, the very first one. But there is no harm reminding of such a fantastic one, still so well preserved.

A link to Meera (1945) with English subtitles in
http://roughinhere.wordpress.com/2013/03/26/meera-1945-tamil-with-english-subtitles/

may have been posted already. From Sabapathy 1941
http://www.youtube.com/watch?v=hhSWQqeiGuU

There are more posts in this blog
http://cinemanrityagharana.blogspot.com.au/2010/05/celebrating-75-years-of-tamil-cinema.html

Saigal's Tamil songs 1935
http://www.youtube.com/watch?v=ZVU0pbXBNj4
http://www.youtube.com/watch?v=GHAwS2aHQuU

A documentary'An American in Madras' about Ellis Dungan is being made. Facebook has some information and stills
http://www.facebook.com/AnAmericanInMadras

Clips about early Tamil films from University of West Virginia archives posted in
http://cinemanrityagharana.blogspot.com.au/2012/11/rare-1930s-tamil-film-and-1950s-padmini.html#more

There is an inersting article by Stephen Putnam Hughes "What is Tamil about Tamil Cinema?", in South Asian Popular Culture, vol.8, no.3. October 2010,213-219 discussing the early days of Tamil...

Yes, the above seems to be from Ashok Kumar 1941. Lyrics here
http://www.indian-heritage.org/flmmusic/songs_mkt/bhoomiyil_mkt.html
Randor Guy's review...

From Ashok Kumar 1941?
https://www.youtube.com/watch?v=zqppQKX9eXo&feature=BFa&list=PLEC71CE051F27E8B4

N.S Krishnan and T.A. Madhuram from 1944

http://www.youtube.com/watch?v=ZQqKHyklBtI

Slightly earlier, from 1939
http://www.youtube.com/watch?v=jwhP6eLTPFE

I find one duet, probably by G.N. Balasubramaniam and M.S. Subbulakshmi at the top of this write up
http://www.gnbalasubramaniam.com/bio-film.htm