Four clarinet-based works in trio, duo and solo from UK composer and musicologist Martin Iddon, performed by Heather Roche on bass and contrabass clarinets, Juliet Fraser on voice for "Muses", Anton Lukoszevieze on cello and James Opstad on double bass; music with intricate, interweaving lines, the title piece a mesmerising work for multi-tracked clarinets and field recordings.

A 4-disc box-set with a 44-page booklet of extensive notes, presenting John Cage's Number Pieces which he wrote in the last five years of his life, adapted for mid-size ensembles and performed by the London-based ensemble Apartment House, compositions 'Five' to 'Fourteen' along with alternative versions of three of the pieces; significant and essential.

Two works from Canadian composer Linda Catlin Smith and performed by cellist Anton Lukoszevieze and pianist Kerry Yong: "Through the Low Hills" a piece for constrained variations like an object viewed from different angles as it is turned over; and "Ballad" a major work intended for performance that unfolds slowly, allowing for delicate melodic interaction.

The UK ensemble Apartment House commissioned this work from composer & experimenter Jim O'Rourke based on their performance of other O'Rourke works, here interpreting a new graphic score designed like a sonic mobile, creating a minimal yet episodic piece of flexible interpretation as the performers whistle, hum and quietly sing in combination with bowed harmonics.

Five fascinating works by the Belgian composer Maya Verlaak, realized by Apartment House and soloists Sarah Saviet & Mark Knoop, experimental compositions including a work of personal reflection based on "Alouette"; a conceptual game piece; a composition layering pre-recorded segments of "Greensleaves"; and two interactive acoustic & computer pieces.

The UK ensemble Apartment House performs two works--Olivier Messiaen's "Quatuor pour la fin du Temps" in 6 movements; and Linda Catlin Smith's "Among the Tarnished Stars"--taking a fresh modern approach to the Messiaen, drawing out its experimental character, and the sense of drama and intricate gradations of sonority in Smith's rich and mysterious work.

When the Zeitkratzer Ensemble was asked to perform a late ensemble work by John Cage, director Reinhold Friedl turned to composer Burkhard Schlothauer, who reworked one of Cage's Number Pieces to create this rich piece using Cage's methods; plus a composition for the dance piece "Bewegte Bauhausbilder"; and an octet commissioned for the Klangzeit-Festival Time Is On My Side.

A live recording of Julius Eastman's 1974 work "Femenine" performed by Apartment House led by cellist Anton Lukoszevieze, with Simon Limbrick on vibraphone, Kerry Yong on piano, Mark Knoop on keyboard, Mira Benjamin on violin, and Gavin Morrison and Emma Williams on flute, an ecstatic and intricate work using a repeating figure contrasted with both asynchronous and complementing backgrounds.

Eight sophisticated chamber pieces composed by Linda Catlin Smith and realized by the Canadian Apartment House ensemble, including a solo piano performed by Philip Thomas, a piano duo with Thomas and Mark Knoop, and works for percussion & cello, 2 quintet pieces for strings, percussion and winds, and two 7-piece conducted works with two percussionists, strings and brass.

New ensemble pieces by Jurg Frey and Magnus Granberg played by Ensemble Grizzana, commissioned by Another Timbre with the request that both start from the same two fragments of early music, one by Johannes Ockeghem, the other by William Byrd, each composer producing fascinatingly different pieces that both contain echoes of the source material.

Morton Feldman's final composition, originally premiered in 1987, here performed by pianist Mark Knoop, violinist Aisha Orazbayeva, violist Bridget Carey, and cellist Anton Lukoszevieze, recording a year after their successful performance at London's Cafe Oto, maintaining focus and concentration on this large, unhurried work of micro-variations.

Three works from Canadian composer Chiyoko Szlavnics, two electroacoustic compositions incorporating sinewaves, one with a saxophone quartet and the other with two accordions, two flutes and two percussionists; and a string trio of long sustained tones and slow glissandi.

Ten pieces dating from 1995 to 2015 from Canadian composer Linda Catlin Smith, performed by Quatuor Bozzini and Apartment House, the first in Another Timbre's Canadian Composer series, a 2-CD release focusing on Smith's "equal and simultaneous drive toward abstraction and lyricism" in slowly developing, lush and sophisticated compositions.

"Two Pianos" is one of Morton Feldman's most experimental and radical works, performed here by John Tilbury & Philip Thomas; plus lesser known works including 'Piece for Four Pianos', 'Between Categories', 'False Relationships and the Extended Ending' and 'Two Pieces for Three Pianos'.