"Born in Buenos Aires, Argentina, in 1941, American composer and clarinet player Guillermo Gregorio has lived variously in Europe and the United States since 1986. Leading his Chicago-based trio and other ensembles, Gregorio has performed extensively, and his compositions have been recorded on numerous CDs by the Swiss label hatART and the American labels New World Records, Atavistic, and Nuscope, among others. His works have been played by noted New Music ensembles in the USA and Europe, among them Makrokosmos Ensemble (Switzerland) , Ensemble N_ER (EU), International Contemporary Ensemble (USA), Fonema Consort (USA), and the Maverick Ensemble (USA). In addition, as an instrumentalist, Gregorio has worked with many experimental and improvisational groups, including those that recorded the music of Cornelius Cardew, Anthony Braxton, and Philip Corner, among other contemporary composers (see discography for details).

As a composer and improviser, Gregorio has collaborated with Fred Lonberg-Holm, Ran Blake, Steffen Schleiermacher, Steve Swell, Jim O'Rourke, Ken Vandermark, Mats Gustaffson, Axel Dörner, Josh Abrams, Jeff Parker, Jason Adasiewicz, Carrie Biolo, George Graewe, Franz Koglmann, Thomas Lehn, Heiner Reinhardt, Le Quan Ninh, Akikazu Nakamura, Ab Baars, Sebi Tramontana, Mary Oliver, Klaus Koch, Gene Coleman, Enrique Gerardi, Paulo Alvares, Vinko Globokar, Makrokosmos Quartet, François Houl, and Stephen Dembski, among others.

He participated in the Argentine experimental music scene throughout the 1960s, '70s, and early '80s. His involvement with New Music included both composing and playing clarinet, saxophone and miscellaneous instruments in the Movimiento Música Más (Fluxus Group), the Experimental Group of Buenos Aires, and the Group of Contemporary Music of La Plata, featuring Fluxus events, multi-media spectacles, environmental pieces, and experimental concerts. Some of his earlier work in Argentina is available in the CD Guillermo Gregorio: Otra Música. Tape Music, Fluxus and Free Improvisation in Buenos Aires 1963-70 (Atavistic UMS/ALP209CD). After leaving Buenos Aires Gregorio had the opportunity to experience the European creative music scene of the middle '80s, i.e. the fruitful convergence of Free Jazz and 20th-century music and its interconnections with visual art. The interaction with composers and artists of that milieu constituted an indelible mark in his further explorations.

Gregorio-a visual artist himself-has frequently explored the intersection of visual and musical experience. His involvement in visual arts and design is a central influence in his music. In his series entitled "Madi Pieces" and "Coplanars" (1999-2005) Gregorio used Constructivist and geometrically generated ideas in scores ranging from conventionally notated material to graphic systems and open structures. In these compositions, a reinterpretation of the fundamental and structural concepts of Constructivism converges with the historical experiences of Argentinean Conceptualism, Fluxus, intermedia synthesis, and graphic realization. In January 2001, he founded the Madi Ensemble of Chicago, which performed original and historical scores that draw from the conceptual foundation of diverse Argentinean avant-garde currents. His scores related to that period have been exhibited in numerous shows at galleries and institutions, among them the Block Museum of Art (Northwestern University, Evanston, IL), Chelsea Museum of Art (NY), Kettle's Yard Gallery (University of Cambridge, UK), and Elastic, Sound & Vision Gallery (Chicago). Some of Gregorio's works belong to the permanent collections of the MADI Museum and Gallery in Dallas, Texas, and the Centre d'Art Geometrique MADI in Paris. His works have been published in Leonardo, Journal of the International Society for the Arts, Sciences and Technology, Notations 21 (Mark Batty Publisher), Noon Literary Annual, and other specialized publications. His series of pieces entitled "Otra Música" (2005 to the present), composed using conventional notation, focus on history and critical issues as well as syntactic aspects of texts and music. Still maintaining the openness of the works from the former period, the name of the series-"Otra Música"-refers to the title of a monthly column on experimental and avant-garde sounds that Gregorio wrote for a specialized magazine in Buenos Aires during the early '70s. Currently, Gregorio's interests are related to improvisation and "composition in real time" playing clarinet, in addition to the aforementioned compositions.

Gregorio has a degree in Architecture, and has worked as a graphic designer. As an educator he taught history and theory of architecture at the University of Buenos Aires, Argentina, and history of industrial design and visual communication at the University of La Plata, Argentina. In the USA he has taught history of 20th-century art and art appreciation at Purdue University North Central, Indiana, sound improvisation at the School of the Art Institute, Chicago, and worked as advisor of Grad Projects in the Sound Department of that School. At the present time Gregorio teaches History of Communication Design at Columbia College, Chicago."

"Pandelis Karayorgis is a Boston based jazz/improvised music pianist, composer and educator.

In the last twenty years mostly led or co-led numerous groups in performances at festivals and clubs in Europe and the United States and Canada. Recordings appear on labels such as Hat Art, HatOLOGY, Clean Feed, Not Two, Leo Records, Nuscope, Boxholder, Okkadisk, Cadence, Accurate, Leo Lab, Ayler and more recently on Driff Records, a new artist-run label co-founded by Pandelis Karayorgis and Jorrit Dijkstra.

Some of the most extensive recording/performing collaborations have been with Nate McBride, Curt Newton, Ken Vandermark, Mat Maneri, Guillermo Gregorio, Jorrit Dijkstra, Luther Gray, Jef Charland, Randy Peterson and Dave Rempis.Pandelis Karayorgis performed and recorded with Joe Maneri, Han Bennink, Mary Oliver, Jeb Bishop, Steve Swell, Frank Rosaly, Jason Roebke, Keefe Jackson, Tony Malaby, Michael Formanek, Forbes Graham, Matt Langley, Jeff Galindo, Taylor Ho Bynum, John Lockwood and Eric Rosenthal.

Also performed with Josh Abrams, Chad Taylor, Jason Adasciewicz, Jacob William, Laurence Cook, Eric Hofbauer, Jeff Parker, Tim Daisy, Jason Stein, Mike Reed, Josh Berman, Charles Waters, James Falzone, Nori Tanaka, Daniel Levin, Kresten Osgood, Jeff Platz and Charlie Kohlase.

Notable projects include The Pandelis Karayorgis Quintet, The Whammies, The Pandelis Karayorgis Trio (whose first trio CD "Heart And Sack" was featured on National Public Radio's program Fresh Air), the mi3, Construction Party, System of 5, the quartet Matchbox, the large group Bathysphere and more recently, the quintet Cutout.

Born in Athens, Greece in 1962, moved to Boston in 1985. Prior to that, studied piano and performed in various jazz groups in Athens while pursuing a degree in Economics. Earned BM and MM degrees in music from Boston's New England Conservatory while studying with Paul Bley, Jimmy Giuffre, George Russell, Dave Holland and Joe Maneri (composition). Studied and performed extensively Thelonious Monk's and Lennie Tristano's music and in 1991 compiled a collection of all of Monk's compositions."

"Mat Maneri was born in 1969, and started studying violin at age five. He studied privately with Julliard String Quartet founder Robert Koff, and with bass virutuoso Miroslav Vitous. Mat received a full scholarship as the principal violinist at Walnut Hill High School, but left school to pursue a professional career in music. By 1990, Mat founded the critically acclaimed Joe Maneri Quartet with Randy Peterson. Mat started releasing records as a leader in 1996, and has developed four working ensembles. Pianists Paul Bley, Cecil Taylor, Matthew Shipp, and Borah Bergman have called upon Matt to perform with them in such venues as the Montreal Jazz Festival, the Library of Congress, and concert stages across Europe. Mat also enjoys a strong relationship with bassists Ed Schuller, Mark Dresser, William Parker, Michael Formanek, Barre Phillips, and John Lockwood. Never to be boxed in, Mat has also worked with Joe Morris, John Medeski, Tim Berne, Cecil McBee, T.K. Ramakrishnan, Franz Kogelman, Roy Campbell, Spring Heel Jack, Draze Hoops, and appears on an Illy B Eats remix CD. Mat presently teaches privately and through the New School / NYC, and performs and records worldwide."