Neethane En Ponvasantham - Discovery

While listening to the awesome songs of Neethane En Ponvasantham (CD | mp3) by Ilaiyaraaja, I made an interesting discovery. To me, it looks all the songs end in the Panchamam (Pa note).  Not sure if it is intentional or if it is coincidental. Songs ending with Shadjamam (Sa note) is very common. But all 8 songs (actually 9) from the album ending in Panchamam was interesting. I will list how each song ends below. Please correct me if I am wrong.

  1. Saindhu Saindhu - This song is in D major. The strings seem to play the Pa note (the note A in western) at the end.
    P P P , P P P ,
  2. Kaatrai Konjam - This song is set in E major. Both the melody and the strings+sax end in the Pa note (B in western) in lower octave.
    Melody: G,m G,R S,N D,P P,
    Sax+Strings: S N n D d P P,PP,PP
  3. Mudhal Murai - This is in B minor. The string hit at the end seems to be the note Pa (F# in western).
  4. Vaanam Mella - This song is set in F minor. The melody at the end, ends in Pa (C in western) in the lower octave.
    SRSnR SRSnR SRSnP
  5. a) Pudikkila Maamu - This is again in E major. The "alarudhu teenage hey" line ends in the Pa note (B in western).
    GGGG G,m, ,,,, P,,,,,,,,

    b) Veedhi Patthade - This is in the scale of Madhyamavathi with A# as the tonic. The short guitar postlude at the end, ends in Pa (F in western).
    nSR S,n R,n,R, PP, P,P,,,
  6. Yennodu Vaa Vaa - This is in E minor. The melody at the end, ends in Pa (B in western) in the lower octave.
    gg,S gggS ggRS R,-- | nSR, R,n, nSR, R,n, | g,S, n,d, P
  7. Pengal Endraal - This is again in B minor. The melody at the end, ends in Pa (F# in western).
    PDNS RgmP P
  8. Satru Munbu - This song is set in D minor. The melody at the end, ends in Pa (A in western) in lower octave.
    PSRg g,,g g,,g g,,S R,,P ,,,,

What do you think?

PS: Thanks to Rajiv Shankar for sharing the scales of the song which helped me to get started quickly.