The soundtrack of Rappakal is more than a collection of songs; it's a testament to the golden era of Malayalam film music. The collaboration between lyricist Kaithapram and composer Mohan Sithara produced lines and tunes that are still cherished. The film's music director skillfully used ragas like Neelambari for "Thankamanassu" and Shivaranjani for "Pokathe," adding a classical depth that complements the film's narrative set in a traditional household.
The music of Rappakal is deeply rooted in traditional Malayalam film music aesthetics, blending semi-classical elements with heartfelt melodies. Composer Mohan Sithara and lyricist Kaithapram created a symbiotic relationship between words and tunes, making each song an extension of the character's internal feelings.