Peter Steiner and his pianistic partner Constanze Hochwartner give an insight on Sapphire into how the combination trombone & piano can and burst the image of what is commonly thought to be the case with the trombone is possible. It can not only sound on the last day, but it can also sing tenderly and sweetly: Soft sounds, the softly pull through all registers, alternate with gripping, powerful, gripping approaches, a large number of Tones that sparkle like a sapphire.