With its Primary-Series instruments, SONOR combines sustainability and superior sound for an application in music education. The birch plywood used for the resonator boxes, as well as the African Pao Rosa, which is used for all wooden sound bars, are FSC-certified and come exclusively from sustainable forestry. Similarly to all other Orff series all woods are treated with ecological Proterra-lacquer to ensure a safe use for all age groups. Moreover, every sound bar is equiped with printed note lines for easier teaching and learning in music education.