Yes, it is. Sujith Vasudevan, now known as Sharath (Sherreth), sings the lines starting with "mEgharaagangaLe...". In many places, the singer's name is still listed as Sujith, causing some confusion!
"angOpangam..." is a great composition by the late M.G. Radhakrishnan. He was an amazingly talented musician, but could never make it big in the movie industry. "oru murai vandhu paarththaayaa..." in MANICHITHRATHTHAAZHU was his creation.
I may have raaga in my name; but that doesn't mean I know too much about raagas! :) I am still an amateur (novice) in that area. Is "angopangam..." set in Chandrakouns?