"En Iniya Pon Nilavae" was written in January 1980, and is set in Natabhairavi, a Carnatic raga. According to Ilaiyaraaja's brother Gangai Amaran, it was one of the hardest songs in the album to write. Mahendra wanted a song depicting Chandru playing the guitar and asked Ilaiyaraaja for a tune; Ilaiyaraaja played the "scratch notes" of the song that would become "Ilaya Nila", but Mahendra was not pleased and asked for another tune; Ilaiyaraaja gave him the tune of "Yen Iniya Pon Nilavae", and this was retained; K. J. Yesudas would sing it. "Ilaya Nila" was subsequently used in Payanangal Mudivathillai (1982). Like "Yen Iniya Pon Nilavae", the song "Paruva Kaalangalin" is also set in Natabhairavi.
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