This music tends to contain lots of melisma and is sung in a nasally temperament. For example, most rondeau phrases end with a long melisma on the penultimate syllable. In Western music, the term "melisma" typically refers to Gregorian chant. Notker set words to this melisma in rhythmic prose for chanting as a trope. The choir repeats it, adding to the final syllable a long melisma called a jubilus. The soprano and alto lines engage in a 57-note melisma on the word "born". The verses are sung by Aguilera using melisma. The fugue subject stresses the word "" (life) by a melisma extended over three measures. Oversinging may also be termed "vocal gymnastics" when referring to usage of melisma. An informal term for melisma is a vocal run. Argov grew up singing in his synagogue with a very defined Middle Eastern melisma. The melisma in Monterverdi must derive from that. The term "rage" is expressed by a long melisma in triplets. The next occurrence of "darkness" is a broken downward melisma. Melisma is also commonly featured in Western popular music.