Nothing is better than leaving the composers, directors and musicologists themselves to be the ones who draw a small sketch of the SIGMA PROJECT.

It was a real pleasure to have Sigma Project in the program of the Ciclo de Conciertos de Música Contemporánea of the BBVA Foundation in Bilbao once more. They performed an impressive concert that included two wonderful world premieres by Alberto Posadas and the young composer Helga Arias. It was an unforgettable concert for many reasons. My most sincere congratulations to Sigma Project!

Gabriel Erkoreka, Director Contemporary Music Cycle BBVA Foundation Bilbao

Bilbao, 3/V/2017

Attending a concert by SIGMA Project is to experiment a musical journey,  where the joy and wonder are always present. It is also to notice a sort of a new virtuosity, understanding this term in its original meaning of “virtue” and “virtuoso”, and not just as circus show of technical and personal skills.

A virtuosity that covers not only the hand that touches but also human breath.

Furthermore, there is in this splendid Spanish group poetic virtuosity whose exercise does not necessarily mean exhibitionism. So, thanks to them, come alive agile winged virtuosity, next to one material earth, another more outgoing and bright, next to one intimate and secret. Listen to Sigma Project is, no doubt, one of the most rewarding experiences you can have.

Mario Lavista (Award Tomás Luis de Victoria, Ibero-American Music 2013)

Mexico, June 2015

Incredible this saxophone quartet! By dint of subtle timbre, Sigma is keen to find the whole universe within the saxophone. An they find it! I said I would inform about it when their CD, including Jesús Torres’ Tenebrae, was launched. Here it is now.  It is called Utopías and it is a very special album, as everything that they do. And also very special – as everything he does – is this score by Torres, which makes saxophones play with a reponsory from the Office of Holy Week by the great Tomás Luis de Victoria.

[…] All of those not aware of Jesús Torres’ achievements in his previous works for saxophone, will be amazed at how he domesticates the color of this instrument. The same will happen to those who have not listened before  Andrés Gomis’ saxophone, alone or within Sigma Project. Do it now, you will not regret it, except for some fault in the receptor of their art. Another day we will talk about other works of the disk, also of great richness: Germán Alonso, Ramón Lazkano, José Manuel López López, Félix Ibarrondo and Juan José Eslava

Alvaro Guibert  (music critic & National Heritage Music Advisor)

El Cultural, December 11th, 2013

The saxophone quartet SIGMA Project is one of the ensembles dedicated to contemporary music more peculiar at our scene. Their high level of artistic commitment, the ethical dimension of their work, the audacity of their proposals transcending music itself, and their huge rigor have made them an indispensable and coveted tool for a number of composers they usually work with. Its four performers can presume of a solid mastery over the instrument and of a huge mutual understanding.

Raúl Jiménez (Audioclásica)

Madrid, October, 2013

Five years ago –or more, depending on the time when you read this text – a new musical collective was born in Spain: SIGMA Project. The idea was beating in the restless minds of a group of contending artists from at least ten months before. However, we had to wait for a concert in the 69th Quincena Musical Donostiarra to see four saxophonists, dressed like angels or some martial-art fighters (barefoot and rigorously in white), showing for the first time in our geography. It was August 27, 2008.

Their second artistic appearance concerns me personally in my capacity as former Director of the extinct CDMC. It was at the Auditorio 400 of the Museo Nacional Centro de Arte Reina Sofia, on October 27 of that same 2008, at the Series I had the honor to program. Since then, they have not stopped offering concerts in Spain and the international scene.

Five intense years have passed. We have suffered, for instance, an economic and social crisis. But we have also seen the fecundity of a project, unusual to a certain point as every good project is, and which seemed to be born already very mature and complete.

The truth is: if the adventures of SIGMA Project were a crime, they would have prescribed. And it may be somehow a wonderful crime to be born with that desire and illusion and, at the same time, boast of seniority and high professionalism.

[…] So, I congratulate SIGMA Project for maintaining their commitment with strong pulse, and I am pleased to see that the white bud (a “stockhausean colour”, as they say and have chosen for the majority of their clothing in concerts) is already a strong stem, and that its five years and what comes, are already a part of the history of Spanish contemporary music. Some may not care much about this but, for me, it is Life itself, and I am sure that is also for them. For this reason, infinite thanks and lots of encouragement for the rest of their artistic lives.

Jorge Fernández Guerra (Music National Prize 2007).

Madrid, October, 2013

I have had the huge privilege and satisfaction of premiering “YUN”, for saxophone quartet, with SIGMA PROJECT, to whom it is dedicated.

I have rarely been provided with the opportunity to share a work so meticulous, introspective and creative like that the one offered to me by every one of the quartet’s members: Andrés Gomis, Josetxo Silguero, Angel Soria and Miguel Romero.

I am deeply grateful for their availability to research, for the experimentation and their commitment to interpretation of a composer’s universe; their inventiveness, their uninhibited force. All of it framed within an exquisite musical sensitivity and an enormous technical capacity.

It is because of that that I consider SIGMA PROJECT one of the most relevant and necessary groups of the beginning of the 21st century.

María Eugenia Luc,

September 23th,  2013

Welcoming Sigma Project for its fifth anniversary, after having seen their ‘birth’ in our Contemporary Musical Fortnight Series, has been a pride and a great satisfaction this August 2013. Once again, the group was distinguished by the richness and versatility of their livelihoods, addressing an eclectic and demanding repertoire, adapting and appropriating the space in which they were positioned, to serve music with passion and imagination in front of an dedicated and thankful audience, with an unquestionable loyalty to the creators, and the enthusiasm and energy of who just started a demanding and fruitful journey. Zorionak eta urte askotarako!

Ramon Lazkano


Even though I have known half of the members of SIGMA Project for several years, with whom I have shared a great deal of agreement in likes and concepts, in an identity of criterion that has been evident in several shared actions, it has not been up to very recent date when I have had opportunity to estimate directly the extraordinary quality of this quartet as such, not only of each of his members individually, -that is evident-, but for the result of a serious, meticulous, constant and deep work that shows model interpretations, technically and expressively, always pledged to the composer. For me it has been a pleasure to be able to collaborate with them, and I hope it goes on.

José Ramón Encinar (National Music Award 1988)

Madrid, 12/X/2011

My gratefulness to Andrés Gomis, Josetxo Silguero, Angel Soria and Michael Romero, components of SIGMA Project, for the extraordinary and unforgettable work they realized at the premiere of my work [Simog-Civitella].

The precision and fineness with which each of them approached the study of every part is admirable; also the success in the way of investigating and deciding the global sound that matched every situation, not always easy to find for the musical notation is precise, but not absolute. What a great dose of imagination is required always on the side of the interpreter, exploring and comprehending the aesthetics and the techniques of the composer whom he or she interprets.

I can only be grateful, and congratulate them, on the perfect connection with the ideas I expressed, both from the technical and poetical point of view.

Their way of working includes the listening of many works of the composer they are working with, and the deep reflection on his way of thinking the music, which turns SIGMA Project into one of the best quartets of saxophones at the international panorama.

José Manuel López López (National Music Award 2000)

París, 14/X/2011

Following the meaning of the mathematical symbol that gives name to the group, Sigma (summation) Project presented a program in which the music was the indispensable, but not the only element at the Contemporary Music Day in Musikaste. The concert was a sum of elements in which the lighting, electroacustics and even the corporal gestures joined to form a heap of intentions and sensations of special visual and sonorous impact.

Sigma Project is a quartet of saxophones formed by four high-level instrumentalists, who share feelings and connect to perfection. Neither doubts nor blanks existed. The five presented works allowed to know not only the most recent ways of composition, but also the possibilities of a plural, rich instrument to approach diverse styles and paces, and with a wide sonorous range.