Aurelia does not play ALWAYS without sheets. I saw them 5 time and they did always one or two pieces without sheets. Al the members of the Amstel studied with Arno.The-A-Sax said:Yes they have great memory. Iknow that remco and Ties studied with Arno Bornkamp, and I think the others did that also, but I am not sure. The aurelian saxophonequartet alsways performs without sheetmusic. They feel they can make a better contact with the audience.