In Mousa's home country he studied music theory, note reading and other key components for enabling them to develop his skills. At age 12 he was levied to the festival for elementary school students. Here grew his interest in music when he met other like-minded people and great musicians.

During high school and college years, Mousa Elias met an oudplayer, Saliba Hanna, who was then the orchestra - and choir director in Mousa's town. Through the orchestra and Saliba Hanna, Mousa developed his music stores and especially morphology, Maqam, music theory, and finally the composition. Mousa attended four years with this orchestra that gave a very broad musical experience and good contacts with many of the country's best musicians.

In 1987 Mousa was named best oudplayer in Syria. 1988-1992 he studied oriental music (composition of oriental music, oud, vocals) in Aleppo. 1992-1995 he studied music from the Middle East in various countries (Egypt, Lebanon and Syria).

1995-1999, Mousa Elias taught oriental music (composition, Maqam analysis and oud) in music school in Aleppo, and he worked as a composer composing music for films.

In 1999 Mousa moved to Sweden and he continued with the music. He played and still play oud solos in Sweden, Europe and the Middle East.

Mousa have composed music for two albums and received a cultural award in 2003, named Eklövet on one of those discs, called 6750 years.

Now, Mousa teach music (music from other cultures, oud, vocals, Maqam analysis and improvisation) at the Royal Academy of Music in Stockholm and in music schools.