There is no string quartet that has ever been written that can compare length and diversity with Terry Riley's Salome Dances for Peace. Morton Feldman has written a longer one, but it is confined to his brilliant field of notational relationships and open tonal spaces. Riley's magnum opus, which dwarfs Beethoven's longest quartet by three, is a collection of so many different kinds of music, many of which had never been in string quartet form before and even more of which would – or should – never be rubbing up against one another in the same construct. Riley is a musical polymath, interested in music from all periods and cultures: there are trace elements of jazz and blues up against Indian classical music, North African Berber folk melodies, Native American ceremonial music, South American shamanistic power melodies – and many more. The reason they are brought together in this way is for the telling of an allegorical story. In Riley's re-examining Salome's place in history, he finds a way to redeem both her and the world through her talent.

On November 11, 2003, Diamanda Galás released two albums, ending a five-year recording hiatus with a bang. Both are solo live recordings and present two very different sides of her. La Serpenta Canta showcased her song-based material (mostly blues). Defixiones: Will and Testament, Orders From the Dead is more typical of her operatic works of the 1990s.

Some people would quickly run away from the music of someone who claims to admire the music of Berg, Crumb, and Cage. Franguiz Ali-Zadeh admires all of those composers and uses similar techniques in her composition, but she also finds inspiration in the music of her native Azerbaijan. With all of this, she creates especially evocative, picturesque works that invite listening more than once. Oasis, the opening work on this disc of her music featuring the Kronos Quartet, begins extremely quietly with water droplets, and then the quartet enters with desolate harmonics, depicting the desolation of the desert. Later in the piece, voices of those taking refuge in the oasis are heard. Ali-Zadeh's music is full of sounds beyond that of the traditionally played instruments of the string quartet and the piano, sounds that enhance and become part of the music. Sometimes it is techniques such as pizzicato, harmonics, col legno, or preparing or playing the strings of the piano; other times it is added instruments, as in Mugam Sayagi, or recorded sound, as in Oasis.

Known for drawing unusual sonorities from conventional instruments, Xenakis strangely left the piano's potential for novel sounds unexplored. In these works, Xenakis stays on the keyboard without so much as a plucked string or any use of gadgetry to alter the instrument's sound. Although that might make these pieces appear less radical, even "safe," Xenakis exploits every other option available.

Released between 1991 and 2005, the selections in The Warner Recordings encapsulate the period when Pierre-Laurent Aimard was signed to Erato and Teldec, performing mostly 20th-century fare and some music from the 19th century. Aimard is famous for his contributions to the modernist catalog, and his performances of works by Pierre Boulez, Elliott Carter, György Ligeti, and Olivier Messiaen are regarded as scrupulously executed and authoritatively interpreted. Aimard also recorded early 20th century pieces by Charles Ives, Alban Berg, Maurice Ravel, and Claude Debussy, as well as Romantic masterpieces of Beethoven and Liszt. A pianist's pianist, Aimard is well-rounded in his repertoire and a true master of keyboard technique, yet he has received considerably less fanfare than many of his flashier colleagues. Yet connoisseurs of piano recordings know that Aimard is indispensible, especially for his special feeling for French music, and his recordings are important documents that serious students and newcomers should appreciate.

The Danish DJ, composer and producer Katrine Ring is one of the few DJs at the international level who has specialized in classical music. On this album she remixes and deconstructs a number of chamber concertos by the composer Vagn Holmboe in a musical game of hide-and-seek that breathes new life into the works in a constant play of memory and recognition. The original recordings by the Danish National Chamber Orchestra and the conductor Hannu Koivula are included as a bonus CD.

This disc is supposed to hurt. Just look at the program: it starts with Crumb's Black Angels for electric string quartet, a work that is the aural equivalent of Coppola's Apocalypse Now, and ends with Shostakovich's String Quartet No. 8, a work that is either the aural equivalent of a monument to the victims of war and fascism written in the ruins of Dresden or the musical equivalent of a suicide note written before the composer joined the Communist Party. With the spooky and evocative performances of Thomas Tallis Spem in Alium, Istvan Marta's Doom. A Sigh, and Charles Ives' There They Are!, this disc is so painful it could be the soundtrack for an unmade Kubrick movie. The question is, is this disc supposed to hurt so much? The Kronos Quartet is a harsh and aggressive ensemble with an angular approach to rhythm and structure and an overwhelming need to assert its individual and collective identity.

Orange Mountain Music presents this new limited edition 11 disc boxed set - The Symphonies by Philip Glass. This collection features conductor Dennis Russell Davies who has arranged the commission of nine of ten Glass symphonies, leading the orchestras over which he has presided during the past 15 years including the Bruckner Orchester Linz, Vienna Radio Symphony Orchestra, Sinfonieorchester Basel, and the Stuttgart Chamber Orchestra. This collection is the fruit of a 20 year collaboration between Glass and Davies and showcases a wide variety within this surprising body of work by Glass.

This may be the single most powerful piece of music that the Kronos Quartet has ever recorded, and perhaps that Terry Riley has ever written. This is because Requiem for Adam is so personal, so direct, and experiential. Requiem for Adam was written after the death of Kronos violinist David Harrignton's son. He died, in 1995, at the age of 16, from an aneurysm in his coronary artery. Riley, who is very close to the Harringtons and has a son the same age, has delved deep into the experience of death and resurrection, or, at the very least, transmutation. Requiem for Adam is written in three parts, or movements. The first, "Ascending the Heaven Ladder," is based on a four-note pattern that re-harmonizes itself as it moves up the scale. There are many variations and series based on each of these notes and their changing harmonics, and finally a 5/4 dance as it moves to the highest point on the strings. The drone-like effect is stunning when the listener realizes that the drone is changing shape too, ascending the scale, moving ever upward and taking part in the transmutation of harmony.

Saxophonist Steve Lehman digs in with drummer Pheeroan akLaff and bassist Mark Dresser in a highly exploratory program. Movement and evolution are the hallmarks of Lehman's compositions, and that is illustrated here by his rearrangement of two pieces: one from each of his previous outings – the opener, "Structural Fire" from the 2001 album of the same name, and "Rison," from Camoflage, issued in 2002.