Why is melodic ornamentation especially important in Indian and Arabic music?

In the context of musical composition, melodic ornamentation is essential to Indian and Arabic music because it serves as a fundamental means of enriching the melodic line and expressing the nuanced character of a melody type.12

Unlike Western traditions that may prioritize original composition, these Eastern traditions are rooted in established modal systems—such as the Indian raga and the Arabic maqām—where the performer’s artistry lies in the imaginative exploration and embellishment of existing melodic formulas.324

Ornaments, including grace notes and trills, are vital for several reasons:

• Microtonality: Both traditions utilize microtonality, employing intervals smaller than a standard Western semitone. Ornaments often incorporate these smaller intervals to add depth and emotional color to the performance.25
• Melodic Refinement: Because these traditions are primarily monophonic, the focus is entirely on the refinement of a single melodic line. Ornaments provide the necessary complexity and texture to sustain interest and convey the specific emotional or cosmological "ethos" associated with a particular mode.2
• Improvisation: Ornamentation is a key tool during the improvisatory sections of a composition, allowing the musician to interpret and expand upon the core structure of the mode.26