Osso Exótico is an experimental, drone music project from Portugal formed in 1989. Utilizing a range of mainly acoustic instruments (often modified) such as glass harmonica, piano strings, percussion, violin, the ensemble created drone, at times mystical and psychedelic ambiences that can be found in their extensive discography. With an always evolving line-up, brothers André and David Maranha have been, since the early times to the present day, the core of this band, that would later , incorporate Patrícia Machás and Francisco Tropa. Together with André and David Maranha they're still the basic line-up. Other members through the years have been António Forte and Bernardo Devlin in the original quartet format and later Oliver Vogt , Manuel Mota and Riccardo Dillon Wanke.