Islamic music may refer to religious music, as performed in Islamic public services or private devotions, or more generally to musical traditions of the Muslim world. The classic heartland of Islam is the Middle East, North Africa, the Horn of Africa, Iran, Central Asia and South Asia, and it also included the medieval Iberian peninsula (al-Andalus). Due to Islam being a multi-ethnic religion, the musical expression of its adherents is vastly diverse. Indigenous traditions of various part have influenced the musical styles popular among Muslims today.
All of these regions were connected by trade long before the Islamic conquests of the 7th century, and it is likely that musical styles traveled the same routes as trade goods. However, lacking recordings, we can only speculate as to the pre-Islamic music of these areas. Islam must have had a great influence on music, as it united vast areas under the first caliphs, and facilitated trade between distant lands. Certainly the Sufis, brotherhoods of Muslim mystics, spread their music far and wide.
The Berber and Arabic speaking countries of North Africa, such as Morocco, Algeria, and Tunisia, share some musical traditions with Egypt and the Arab countries of the Middle East. Popular modern styles of music such as Raï and Chaabi originated in Berber counties. In addition, West African influences can be heard in the popular music of Gnawa.
Most Somali music is based on the pentatonic scale. That is, the songs only use five pitches per octave in contrast to a heptatonic (seven note) scale such as the major scale. At first listen, Somali music might be mistaken for the sounds of nearby regions such as Ethiopia, Sudan or Arabia, but it is ultimately recognizable by its own unique tunes and styles. Somali songs are usually the product of collaboration between lyricists (midho), songwriters (lahan), and singers ('odka or "voice"). Instruments prominently featured in Somali music include the kaban (oud).