Mansour Zalzallate 700s - early 800s was an Arab

Arab

Arab people, also known as Arabs , are a panethnicity primarily living in the Arab world, which is located in Western Asia and North Africa. They are identified as such on one or more of genealogical, linguistic, or cultural grounds, with tribal affiliations, and intra-tribal relationships playing...

  Musician and composer of Al-Kufa during the Abbasid

Abbasid

The Abbasid Caliphate or, more simply, the Abbasids , was the third of the Islamic caliphates. It was ruled by the Abbasid dynasty of caliphs, who built their capital in Baghdad after overthrowing the Umayyad caliphate from all but the al-Andalus region....

 era. Contributed musical scale

Musical scale

In music, a scale is a sequence of musical notes in ascending and descending order. Most commonly, especially in the context of the common practice period, the notes of a scale will belong to a single key, thus providing material for or being used to conveniently represent part or all of a musical...

s that were later named after him (the Mansouri scale, Arabic,المقياس المنصوري) and introduced positions (intervals) within scales such as the wasati-zalzal.

Mansour Made improvements on the design of the lute instrument. Mansour was the Teacher of great musician Is'haq al-Mawsili.