Compare and contrast the use of improvisation techniques in Indian classical music and one selected Middle Eastern musical tradition, focusing on the underlying principles of their respective modal systems.

Improvisation in both Indian classical music and selected Middle Eastern traditions, such as the Persian classical music, is central to the performance practice; however, the underlying principles of their modal systems and their approaches to improvisation differ considerably. While both emphasize a melodic-focused approach, the nuances within their respective structures reveal distinct cultural aesthetics and musical philosophies. In Indian classical music, improvisation, known as "manodharma sangita," is a highly structured and intricate art form that stems from the Raga system. A Raga is not simply a scale but is a melodic framework with specific rules for ascending and descending patterns, emphasized notes, and characteristic phrases. Each raga is associated with a specific mood, time of day, or season, further restricting the melodic options and defining the expressive landscape. Improvisation within the Raga framework follows a very organized path. It typically begins with the "alap," a slow, unmetered exploration of the Raga's melodic essence, gradually moving towards the "jor," where a pulse is introduced, followed by the "jhala," where the rhythmic intensity increases. After this preliminary exploration, the main composition (a "bandish" in Hindustani or a "kriti" in Carnatic music) serves as the base for more structured improvisation. Improvisation in Indian classical music involves a combination of melodic elaboration through note variations ("gamakas"), rhythmic variations ("layakari"), and the introduction of new melodic phrases within the boundaries of the raga. The aim is not to deviate from the raga's character, but to express its emotive qualities in new and creative ways. ....