sentences:  Ghielmi’s collaboration with traditional players and in particular with the Sardinian traditional singers of the Cuncordu de Orosei, which lead him to a new insight in the European ancient music, is documented in the film “The Heart of Sound”, BFMI (Salzburg-Hollywood).He has made many recordings, winning many prizes (for labels such as Winter&Winter, Harmonia Mundi, Teldec, Decca, Sony, Auvidis, Opus 111, Passacaille, Alpha Outhere) covering all the musical styles and the entire viol repertoire; four CDs are dedicated to the virtuosic gamba concerti by Johan Gottlieb Graun (1702-1771).Recently published (2018) is the Cd "Gypsy Baroque" with the singer Graciela Gibelli, the cymbalist Marcel Comendant, and the violinist improviser Stanislav Palúch.