In the field of music, Changmarín has produced a long list of compositions, both in writing lyrics and creating the musical arrangements. One of his best-known creations comprise the lyrics for Tio Caiman, made famous by the Chilean group Quilapayún. The piece has also been recorded in Colombia, Nicaragua, Cuba, and Panama by several music groups.
In the context of music, Changmarín has made significant contributions, including writing lyrics for Tio Caiman, a piece that has gained widespread recognition. This song has been performed by multiple music groups across various countries, including Colombia, Nicaragua, Cuba, and Panama.