Within the OEK, the first two volumes of the six-part edition of Jacques Offenbach's progressive duos for two violoncellos Op. 49-54 are available now. The compositions created by Offenbach, who was a virtuoso on the violoncello himself, are not only suitable as methods of violoncello technique but are also suited for duet playing and delightful music-making at home and at performances. Both parts are contained on the accompanying CD and can be listened to separately or together.