Venkkiram - that song was a collaboration with guitarist Prasanna (who also did some memorable work with ARR).
IR's creativity visualizes the electric guitar played like a veena and Prasanna does it beautifully ! and still it is in perfect sync with the song and its mood.
check this out from Malayalam - https://www.youtube.com/watch?v=aeqgu6t4RkI
you dont have to understand the lyrics, but IR takes us to Kerala backwaters with the combination of the tune /melody, and orchestration !