Mugham describes a specific type of musical composition and performance, which is hard to grasp with western concepts of music in another respect: for one, mugham composition is improvisational in nature. At the same time it follows exact rules. Furthermore, in the case of a suite-rhapsody-mugham the concept of improvisation is not really an accurate one, since the artistic imagination of the performers is based on a strict foundation of principles determined by the respective mode. The performance of mughams does therefore not present an amorphous and spontaneous, impulsive improvisation.