A rousing instrumental composition in the melodic mode nahawand, composed by the famous Egyptian composer Riyâdh As-Sambâti. As a genre, the longa is composed in four-beat timing, with a number of sections, each of which is repeated. In addition, there is a recurring melodic refrain. The final new section is in waltz timing, after which the recurring section returns. The longa is a secular piece, and is often performed as the opening number at a concert.