I have known half of the members of Sigma Project for several years; with them I have maintained a great harmony in tastes and concepts and in identity of criteria, having the opportunity to be sufficiently in evidence in several shared performances. The truth is that, very recently, I have had the opportunity to appreciate live the extraordinary quality of this quartet, not only for the individual quality of each of its members, evident, but for the result of a serious, meticulous, constant and deep work. A quality that can be glimpsed in exemplary interpretations, for technique and expression, always appropriate to the composer who is the focus of Sigma Project’s attention. For me it has been a pleasure to be able to count on his collaboration which, I fervently hope, will have immediate continuity.
José Ramón Encinar (National Music Prize 1988)