Belgian avant-garde jazz band formed in the early 90s (pronounced as Ah-kah Moon). The core trio of the band is saxophonist and composer Fabrizio Cassol, electric bassist Michel Hatzigeorgiou and drummer Stéphane Galland.

Their sound is a mixture of jazz, rock, world music, avant-garde, and they integrate various different African, Indian, Maghrebian, Cuban, Arab, Afro-Amercican and European traditions in their music.