AMM percussionist Eddie Prevost playing all bowed sources in a subtle and ringing duet of bowing approaches with violinist Jennifer Allum of the London Post Quartet.

Members of Eddie Prevost's weekly improvisation workshops, violinist Jennifer Allum and cellist Ute Kanngiesser, recorded these 3 improvisations, running the gamut from spacious harmonics to vigorously weaving dialog, in 3 rooms of St Augustine's Bell Tower in London.

This duet between cellist Altenburger and guitarist Russell was recorded at the Musique en Mouvement Festival Theatre du Jarnisy in 2008, an intense and intricate dialog of great dynamics.

ap'strophe began working together in 2006 in search of a common sonoric space, which they found in the investigation of distinctive timbres between acoustic guitar and zither.

Four performances of Iancu Dumitrescu & Ana-Maria Avram's iO String Quartet playing their compositions for string quartet & tape live in London, Brussels and Paris.

Electro-acoustic composers Ana-Maria Avram and Iancu Dumitrescu with large groups including the Hyperion Ensemble, plus Tim Hodginkson on clarinet, performing in Conway Hall, London in 2008.

The full performance of legendary improvising guitarist Derek Bailey's 2001 exhilarating duo with bassist Simon H. Fell at Sound 323, originally released as a mini-CD and voted record of the year in 2002 by The Wire.

The debut album from the NY based Baloni trio, blending chamber techniques with a unique approach to improvisation, as performed by bassist Pascal Niggenkemper, violist Frantz Loriot, and multi-reedist Joachim Badenhorst.

In the second volume of their collaboration, Banabila and Van Geel explore further into their neo-classical mix of viola improvisations, ambient textures, minimal compositions, and modular experiments.

The London based improvising string trio Barrel of Alison Blunt on violin, Ivor Kallin on violin & viola, and Hannah Marshall on cello, all members of London Improvisers Orchestra and performers at the 2007 Freedom of the City.

Two instruments - Bertoncini on violin; Lehn on analogue synth - with totally different histories come together and look for a connection across two great sets from 2006 & 2010.

Three free improvisations for voice & double bass + improvisations on Hugo Ball's Six Sound Poems from the duo of free improvising vocalist Jaap Blonk and double bassist Damon Smith.

Berlin double bassist Nadav Masel and Israeli guitarist Ido Bukelman performing on banjo, acoustic guitar & bells, in live recordings at Barbur gallery in Jerusalem, Israel in 2013 for 5 free works of flight, which they describe as "Improvisational Pieces for Meditations".

Dark and beautiful improvisation from saxophonist and electronics artist John Butcher and harpist Rhodri Davies, an incredible display of timbre, technique, and pacing.

Theo Ceccarelli expands his string trio from their Ayler debut album, "Carrousel", adding bassist and free vocalist Joelle Leandre to the group, yielding a new dimension to their rapidly expanding repertoire of rich, interactive improvisation.

Six unorthodox sketches for acoustic violin, focusing on advanced techniques and preparations including a plastic peg, a spring, and a nail file, from London based Angharad Davies, recording live improvisations at Goldsmiths University.

Improvising harpist Rhodri Davies in a solo career retrospective box set with 4 LPs (+ download codes) in screenprinted heavy card sleeves with artwork by Jean Luc Guionnet, plus curated flyers, posters, a booklet written by Rhodri Davies, an essay by David Toop, &c. &c.

A telematic bass ensemble performing for peace in the Middle East, including Mark Dresser, Barre Phillips, Bert Turetzky, JC Jones, Thierry Barbe, Henry Grimes, Trevor Dunn, Lindsey Horner, &c.

French free improvisers Benjamin Duboc (double bass) and Jean-Luc Petit (contrabass & clarinet) in a moody album of bass tones, deep harmonics and rich timbral interaction with beautiful pacing that rises in confrontation and then descends back to artful darkness.

Kadima's and Dresser's beautiful Deep Tones for Peace project, bringing bass players together to perform live at remote locations, here in configurations from solo to a 5 bass ensemble.

French bassist Benjamin Duboc, part of The Turbine!, Nuts, and a member of the Dark Tree roster, in a solo album of two extended improvisations: the traditional folk song "St. James Infirmary Blues"; and a free improvisation named for the church in which the album was recorded.

Virtuoso double bassist John Eckhardt in eight performances of polyphonic and other-worldly explorations showing the instrument's breadth of sonic potential.

UK European free improv in-demand double bassist John Edwards in what is surprisingly his first solo album, recorded by John Wall at his Utterspalm studio.

Guitarist Sandy Ewen and double bassist Damon Smith recorded these 2 extended improvsations in concert as part a "Desbordamientos" series at Cine Tonala, in Mexico City, pairing live music with screenings of Derek Bailey's 4-part series on improvisation.

Violinist Guido Del Fabbro in a 5-piece work with violin, voice, electronics and synthesizer, blending compositional and electroacoustic principles for an unusual, rich, and thoroughly modern album.

The Ives Ensemble playing one of Morton Feldman's later and shorter works, the 1979 "String Quartet," in a digital DDD recording from 2005.

Double bassist Alexander Frangenheim, peer to Phil Durrant, Evan Parker, Phil Wachsman, Thomas Lehn, Roger Turner, &c., in a 17 part solo work of gripping and exhilarating playing.

"Zwirn" means "twine" in German, an apt description of the interweaving sound that double bassists Daniel Studer and Peter Frey play together, in 7 freely improvised works of unusual technique and new musical structures.

Deconstructed sounds from Ralf Wehowsky (RLW) on electronics & Johannes Frisch on double bass, citing Ornette Coleman's "Free Jazz" album as an (abstract?) influence, using noise, glitch, acoustics and jump-cut compositional styles that surprise but won't make you want to dance.

A hybrid acoustic tape piece of solo violin on four track tape, and a work for four violins, composed in 1974 by Harley Gaber, delicate pieces that he considered complements to his large work "The Winds Rise in the North".

Composer Harley Gaber wrote this piece for strings as an emotional examination of the questions posed by Taoist philosopher Chuang Tzu, here performed by a quintet including violinist Malcolm Goldstein.

Extraordinary reed player Gjerstad on alto sax and clarinet in a quartet with two cellos (Fred Lonberg-Holm & Amit Sen) and all around drummer Paal Nielsen-Love.

The first of Trosts "Jukebox Series" of 7" records brings saxophonist Mats Gustafsson together with violinist Albert Oehlan for a 2 song EP of unusual free improvisation.

Astute improvisations using extended language from the duo of Thomas Heberer (ICP) on cornet and Pascal Niggenkemper on double bass, two European free improvisers based in New York and pushing the limits of the improvised duo in accessible ways.

Captivating improvisational journeys with drummer and percussionist Gerry Hemingway and Jin Hi Kim performing on the Korean komungo black zither .

Camper Van Beethoven violinist Segel teams up with West coast koto player Shoko Hikage that intermingles Eastern and Western instruments in a pleasantly mystifying release.

Violist and vocalist Charlotte Hug met Fred Lonberg-Holm in Zurich, 2009 to make these concert recordings, a duo taking stringed instruments into unique and irrepressible territory.

Using extended techniques on viola and piano, Charlotte Hug and Frederic Blondy draw the listener into unusual and encompassing sound worlds that feel electronic, yet are created through acoustic improvisation.

An intensely personal journey, Charlotte Hug uses extended vocal techniques and an unusual language on the viola, creating an exceptional and unique improvisatory sound world.

Part of a sound installation and exhibition of sculptural work by Reinhard Reitzenstein, the Test Tubes perform with strings, glass instruments, and unique instruments to create music of unusual and complex timbral combinations.

ist (The Improvising String Trio) of Rhodri Davies (harp), Simon H. Fell (bass) and Mark Wastell (violincello) performing at The Natural Music Club in London, 1997, using unorthodox techniques in indeterminate systems and free improvisation for fascinating results.