Two large scale choral compositions recorded at New York City's Park Avenue Armory and at South London Gallery: ""Teenage Lontano" re-envisions composer Gyorgy Ligeti's 1960s orchestral work, using an immersive sound environment and the collective voices of an ensemble of teenagers; in "roygbiv&b" a teen ensemble in London riff off of mis-hearings of the acronym "ROYGBIV".

A 3-part performance work exploring the effects of powerful climate forces affecting the poles of our planet, as Philip Samartzis and Eugene Ughetti use recordings of radar & scientific instrumentation used in upper atmospheric research along with custom built instruments, producing a unique series of textures, rhythmic cycles, resonances, and timbral phenomena.

A diverse set of works from Australian composer Cat Hope, employing acoustic instrumentation--strings, keys, flutes, reeds & percussion--along with electronics and field recordings, in chamber configurations from duos to quintets, performed by the Western Australia Decibel new music ensemble for which Hope is both director and a performer.

Aubjects label leader D. Petri (Amalgamated, Dog Hallucination) continues his work in unusual and sometimes aggressive exploration of the guitar as a sound source, looking for "novel anomalies" in amorphous compositions, seeking an extreme mixture of audio fidelities, peculiar equipment configurations, personally significant field recordings & various multi-level manipulations, in parts joined by Hillary Ulman on percussion.

A split 10" vinyl album of two very different works: first French sound artist Jean-Philippe Gross in a sonic assault of garish rhythmic electronic persistence and noise; then the Golden Oriole instrumental rock duo of Kristoffer Riis on guitar and Thore Warland on drums in a compelling work of grooving structure with diverse percussive interaction.

The French Lunar Error Ensemble employ acoustic and electric instruments including reeds, piano, percussion, electric guitars, synth & computers to create complex drone and sonic environments, here performing Jean-Luc Guionnet's work for micro-variations and harmonic interference, a slowly building and massive work recorded in the resonance of the Protestant temple, in Reims.

Unusual approaches to rock song and instrumentals from this French duo of Apolline Schöser & Nocola Henry in collaboration with Valentine Noiret, Daniel Dariel on Japanese vocals, Louis Claus on Indian flute and Marie-Laure Gucciardi for poetic writing in Italian, &c.; peculiar and compelling, somehow reminiscent of Etron Fou...

Essential members of the Downtown NY scene since 1981, the collaborations of turntablist Christian Marclay and multi-instrumentalist Elliott Sharp, here on 8 string guitarbass, bass clarinet & electronics, is distilled in this extremely creative electroacoustic/concrete duo, recorded live in convert at the Knitting Factory in December, 1997.

The Winter 2021/22 issue of Canada's premiere music magazine explores the creative ideas of artists engaged in beautiful, daring musical acts of innovation, celebration, and resistance--Alanna Stuard, Yves Charuest, Roxanne Nesbitt, New Age Doom & Lee Scratch Perry--plus Beny Esguerra, Jessica McMann, Juro Kim Feliz, Backward Music; and recorded & live reviews, features, &c. &c.

A double CD compilation released to celebrate the 5th anniversary of the electro-acoustic improv space E42.A8 based in Tournai, Belgium, featuring 21 musicians, in varying ensembles, from 2 to 9 people, presenting an eclectic and diverse mix of styles and approaches to experimental music through textures, rhythm, and indescribable sound sources; fascinating.

Four works from Amsterdam-based Argentina composer Gabriel Paiuk, particularly "The Construction of an Imaginary Acoustic Space" about the intertwining of technology, affect, space and listening, performed by the New European Ensemble in a mix of strings, reed, brass, piano and tape; also a solo work for cello; a solo work for piano; and a piece for three clarinets.

Strange environments of sound from the French trio of Simon Le Vigouroux on double bass, Cyril Noël on electronics and Thomas Coquelet on electronics, in two morphing works connected by name through each side of the cassette, expeditions guided by murky rythmic elements and mutated field recordings, surrounded by rich and darkly tinged sonic elements.

An apt title for the creatively mechanistic rhythms and electronic machinations of David Lee Myers' long-running project Arcane Device, in an album of ten succinct tracks of distinct cadence, pulse and encompassing electronics, described by Myers as "Analog rhythms, microtonal swarms, and feedback tonalities for pagan rituals on Monster Island."

Like passages through an electronic corridor, New York electronic artist David Lee Myers (Arcane Device) presents a series of "interludes"--long passages of rich electronic sound--and "intervals" of punctuated rhythms, described by Myers as: "In-between spaces for catching one's breath amid frigid landscapes, existential pauses, and mercurial pools of aboriginal pleadings."

The 4th of NI-VU-NI-CONNU's 5-LP John Butcher series and part of a 2 night residency at ausland in Berlin coinciding with his 65th birthday, tenor & soprano saxophonist John Butcher is joined in a quartet by electroacoustic improvisers, trumpeter Liz Allbee, Ignaz Shick on turntables, sampler & electronics and Marta Zapparoli on tapes, reel-to-reel tape machines and antennas.

An offshoot of the Metal Chaos Ensemble featuring three of the core members--PEK on reeds, winds and the Evil Clown arsenal of percussion, Eric Woods on analog synth, and Bob Moores on space trumpet, guitar, and electronics, joined by guest Mike Gruen on electric bass, using a new SoundCraft mixer allowing advanced real-time signal processing from Joel Simches.

A slyly disruptive set of minimalist compositions from New York electronic artist Dominic Coles, recounting six dreams, each described in the liner notes, by using the voice to drive various forms of synthesis on computer and through circuitry, a curious and surprisingly detailed retelling through unexpected tone, punctuation, confrontation and silence.

After a few years of working, touring and one-off performances in New York City with Mazz Swift (violin & voice), Ron Stabinsky (synthesizers) and Levy Lorenzo (percussion & electronics), trumpeter Peter Evans recorded this incredible album, a new direction in his work with small ensembles, incorporating electronics into his exceptional compositions for creative improvisation.

An offshoot of Metal Chaos Ensemble featuring the core members of that band--David Peck on clarinets, saxophones, flutes, winds & percussion, Eric Woods on analog synth, and Bob Moores on space trumpet, guitar & electronic--with Joel Simches performing real-time signal processing, in an extended improv concert of acoustics & electronics streamed live from The Evil Clown Headquarters.

Putting less focus on the strings and more into sonic environments, French guitarist Pierre Gerard releases a set of eight abstract compositions for voice, guitar, cello, piano, violin, bass clarinet, electronics & field recordings, intended for random playing, employing silence and active sections to catch the passive or background listener off guard.

An extraordinary and powerful concert at the 2009 Jazz in Luz Festival recorded at Marquee of Luz-Saint-Sauveur when Japanese improvising guitarist and vocalist Keiji Haino joined the electroacoustic improvising trio Marteau Rouge of Jean-Francois Pauvros on electric guitar, Makoto Sato on drums and Jean-Marc Foussat on analog synthesizer & voice.

Five extended works of descriptive ambience from Finnish composer and musician Jukka-Pekka Kervinen, working with algorithmic and electronic manifestations over five pieces--four works "Across" and one "Across (Lines)"--based on environmental field recordings of birds and ambiance, structures that he morphs & reiterates to create different facets of a single outdoor space.

Composer and sound artist Chaz Underriner composed these eight meditation in 2021 during residencies at the Atlantic Center for the Arts and the NYU Music Technology studios, recorded at Stetson University in Florida with an ensemble including four vocalists, cello, piano, percussion, electronics and field recordings; beautifully introspective and thought provoking works.

A double album of experimental works and songs, virtual meetings curated by composer Dante Boon, recorded in the performer's individual cities as ensembles formed from musicians who have never met, including the Moscow duo The Same Ensemble of Sasha Elina and Kirill Shirokov, Amsterdamn's Seamus Cater's Tree Space, Berlin's Konzert Minimal, and sound artist Gabi Losoncy.

The third release from the Barcelona-based experimental improvising duo L'Ocell of Chilean acoustic guitarist Fernando Carraso and Spanish double bassist Àlex Reviriego-double bass, here joined by guitarist Ferran Fages (a member of Phicus and Radium with Reviriego), for a set of mysteriously dark improvisations recorded live at Sant Roma de Mianigues church.

A startling and energetically exciting collision of cleverly eclectic sound sources when Swiss turntablist and sound artist Joke Lanz met Austrian improviser and turntablist Dieb13 (Dieter Kovacic) for this amazing 2020 concert at GrillX in Vienna, using three turntables to create an incredible collage of sounds from the humorous to the awe inspiring.

Eliane Radigue received a grant from the French Government to compose these works, realized between 1981 and 1983 in her Paris analog studio on Arp synthesizer, with vocal submission from Robert Ashley and Tibetan teacher Lama Kunga Rinpoche, composing five songs in tribute to the Tibetan saint and poet from the eleventh century, Jetsun Milarepa.

Initially based around improvisations on a mbira and a tiny accordion, NY improvisor Ted Reichman expanded the concept through complex systems of electronic treatments, developing layers of feedback, transpositions, distortions, intentional or accidental patterning that were performed in real time, creating an extended, deeply aquatic work split between the sides of a cassette.

The 2nd installment in percussionist Matt Weston's opera for percussion and electronics in a limited cassette + download, a cantankerous set of recordings that alternate disruption with introspectively unusual techniques realized through graphic, multidimensional and instantaneous scores, each piece a narrative exploring mental health struggles as they develop over time.

A unique album of oddly metered yet highly rhythmic jazz from guitarist and composer Mané Fernandes, a member of Pedro Alves Melo Omniae Large Ensemble, but more importantly, part of a scene he refers to as Post-Beat Aesthetics, merging electronic and synthetic elements into jazz form, a serious and diverting direction for creative improv and studio play.

Featuring some of Poland's most interesting improvisers and contemporary players and led by wind & reedist Marek Pospieszalski, this 8-piece ensemble use the compositions of Krauze, Kotonski, Baird, Rudzinksi, Stachowski, Sikorsi, &c. as the inspiration and influence for sophisticated arrangements & improvisations merging concepts of jazz, contemporary composition & sound art.

Four improvisations recorded iteratively during the pandemic and assembled into this exquisitely subtle two-part composition with Eva Maria Houben's piano & organ recorded in Berlin in 2020, Guilherme Rodrigues's cello recorded in Berlin and Ernesto Rodrigues's zither recorded in Lisbon in 2021, merged with nocturnal recordings from Carlos Santos captured in Spain & Portugal.

A collaboration recorded in New York City and Paris through the exchange and evolution of sound files between sound artists and instrumentalists, percussionist Flin van Hemmen and pianist Jozef Dumoulin, each using samples, field recordings, percussion, keyboards, voice and programming to create sound portraits of propulsive impetus and reflective evocation.

The second in Discus Music's "Unreleased" series selected from percussionist and electronics legend Tony Oxley personal collection, here in three configurations: a quintet with Barry Guy, Dave Holdsworth, Howard Riley and Paul Rutherford; a quintet with Howard Riley, Larry Stabbins, Phillip Wachsmann and Hugh Metcalfe; and a duo with Stefan Hoekler.

Live recordings in France, 1999 from the trio of saxophonist Michel Doneda, turntablist Erik M, and guitarist/electronic/object player Jean-Marc Montera, a frenetic concert of sonic mayhem.

French guitarist Richard Pinhas, Japanese electronics and noise artist Merzbow, and the American trio Wolf Eyes performed together at the 2011 Victo Festival, with this massive recording one result.

New Yorkers Snow, Licht and Onda in their 2007 Victoriaville performance, an improvised set using sound from sparse to dense with mutated field recordings, synth, radio, &c.

Actuelle turntablist Martin Tetrault meets with radical hip-hop DJ Kid Koala at the 22nd Festival International de Musique Actuelle de Victoriaville in energetic duos filled with humor and instrumental acrobatics.

Francisco Lopez initiated this project in 2006 with the Pogus CD "Montreal Sound Matter", now expanded into an acousmatic group of linked tracks from a group of impressive sound artists.

An extended improvisation interweaving acoustic and electronic instruments in a beautifully coherent evolution of mysterious and approachable sources, from the trio of Jan Bang, David Toop and Mark Wastell, combining tam tams, gongs, flutes, lapsteel, live sampling, gongs, brushes, elastic, paper and more to captivate the curious listener.

Reissuing their limited 2014 release on Joachim Nordwall Editions, the Oceans Of Silver & Blood duo of Joachim Nordwall on analog synthesizer, effects & tape and percussionist Mark Wastell on tam tam and timpani present two pieces, the first an environmental work underpinned by subtle percussion, the second a richly resonating work of threatening warmth.

"The long-standing improvisation outfit CCMC recorded sparsely. A short tour of Quebec in May 1997 opened the door for a live album on the label Disques Victo. The CD aCCoMpliCes culls excerpts from shows at the Festival International de...

"The background: Xavier Charles has recorded an album (La Pièce) with the duo Kristoff K. Roll (Jean-Christophe Camps and Carole Rieussec); Diane Labrosse and Martin Tétreault record and perform together as the duo Parasite...

"Even though J.A. Deane has collaborated with many American avant-garde musicians, his solo albums are few. Sadly, his most accessible is also one of his less interesting. Nomad is an untypical release in the catalog of the label Disques...

"This weird little album was made by a quartet of improvisers from all ends of the improvisational planet, who came together in 1993 for a recording date. Edited by Oswald in Toronto, the result can be found here. With two guitarists (K...

"Prior to the release of this CD, Mexican flutist/pianist Roberto Morales Manzanares was virtually unknown in North America. He met Japan-born violinist Mari Kimura when she played at Callejon del Ruido, a new music festival Manzanares ...

"On her debut album for Victo, the former Michigander and downtown New York music stalwart enlisted the skills of three of her four sisters, producer David Shea, electronic percussion maestro Ikue Mori, and guitar hero Chris Cochrane. T...

"Recorded live at the Festival International de Musique Actuelle de Victoriaville in May 1996, In the Land of Milk and Honey features trombonist Anne-Marie Roelofs' Waste Watchers trio, which also features Johannes Krämer (electric ...

"Psycho-Acoustic is guitarist Elliott Sharp and harpist Zeena Parkins, and Blackburst is their first album together under that name (their first album was titled Psycho-Acoustic and simply credited to Sharp and Parkins). As with their f...

"In October 1987, keyboardist/computer wiz Richard Teitelbaum and violinist Carlos Zingaro performed at the Festival International de Musique Actuelle de Victoriaville. The next year the label Disques Victo released The Sea Between, comp...

Two distinct session, the first CD presenting free improv trio perfomances in St. Louis, MO between Paul Hartsaw on soprano & tenor saxophones, Damon Smith on double bass and Jerome Bryerton on percussion, the 2nd CD finding Hartsaw and Smith in the studio in Oakland CA for a more experimental session, Smith adding laptop & field recordings and both employing extended techniques.

14 musicians from 9 different countries in various collaborative groupings performing acoustic & electronic free improvisations, the focus on soundscape and limited to 15 minute performances, developed by saxophonist Harri Sjöström in 2013 as "SoundScapes Festivals" and presented in Helsinki and now in Munich as part of the art-project "Aspects of Free Improvisation 2021".

With titles for the album and all compositions from a poem by US poet E.E. Cummings, guitarist Samo Salamon developed these structured improvisations during the pandemic, inviting a set of masterful improvisers including Martin Küchen, Luis Vicente, Vasco Trilla, Emanuele Parrini, &c. &c. to contribute to these magnificent long distance collective improvisations.

Two extended sound collages and cut-ups from field recordings and percussion recorded during tours from 2014 to 2017, the title taken from a sign in one of the hotels that Jerman & Barnes stayed at, apt for the mix of punctuating locations, dissipating noise and unusual percussive passages, a fascinating journey that expands and contracts to make captivating stories.

The 10th release in Japanese experimental sound artist Toshimaru Nakamura's No Input Mixing Board (NIMB) instrument series, composing from the ephemeral and extraneous sounds of a mixing board with nothing connected, these assertive pieces composed in his home studio while reflecting on the changes and obscuring of many of Tokyo's small streams and rivers.

A series of live recordings and related materials that trace the development of turntable artist Marina Rosenfeld's tactile approach to experimental sound, using dub plates--vinyl albums she has had pressed to develop a personal library of sound for performance--here in six improvisations accompanied by a 24-page book with a discussion between Rosenfeld and Lawrence English.

Known from the TGB trio and work with Bernardo Sassetti, Portuguese deep brass player Sergio Carolino turns from his typical tuba for a solo album on a new instrument of his own invention--the lusophone--a standing tuba based on the Jazzophon, a trumpet in the shape of a saxophone, here built from parts of frontal bell tubas and demonstrated in an impressive, extended improvisation.

A collaborative album from Dutch sound artists M. Klein (Adept, Sweat Tongue) and Steffan de Turck (Staplerfahrer) using field recordings and keyboards in two extended sound collages that take familiar sounds and transform them into a journey through an imagined land, accompanied by melodic synthetic fragments, a reflective work like a lost memory.

Composed from a combination of violin, percussion, vocals, field recordings & electronics by Rutger Zuydervelt, who initially merged unrelated recordings from violinist Anne Bakker (also on harmonica, kazoo & saw) and percussionist & sound artist Rene Aquarius, all three then overdubbing and editing the work to create this fascinating tapestry of hallucinogenic sound.

Using electric & acoustic guitars and autoharp over spacious electronics and field recordings, Belgium musician & video artist Jean De Lacoste and Rotterdamn sound artist Rutger Zuydervelt, aka Machinefabriek, create broad pallets of ringing sounds over which acoustic instruments intone, with cellist Fransesco Guerri joining on one of 8 gently unfolding "Scramblings".

Featuring cellists Nina Hitz and Lucija Gregov, double bassist Goncalo Almeida and Rutger Zuydervelt (Machinefabriek) on electronics, recording in Old Church, in Rotterdam Charlois for six pensive improvisations, a collective conversation of concurrently layered, minimalist melodic and textural lines expanded with drones, evoking the mythical Greek multi-headed monster.

Following his collaborations with choreographers & dancers Marta Alstadsaeter and Kim-Jomi Fischer resulting in the performances & albums As Much As It Is Worth and Engel, Rutger Zuydervelt composed this work for their dance/circus performance Our Arms Grew Together about romantic relationships, developed around recordings from the daily lives of Alstadsaeter and Fischer.

Unique to the vast catalog of Rutger Zuydervelt, aka Machinefabriek, this album was developed with Zuydervelt original material and then remixed by Matt Wand, Nick Storring and Phil Maguire, presenting the original highly rhythmic electronics at the base of "Prisma", then 4 remixes: "Scarlett's Blood Bubbles"; "Tactile Debt"; "Thigh Slapping Without Tears"; and "Wheats Flats".

Two versions of the soundtrack to the Dutch movie BERG composed by Rutger Zuydervelt, the first rearranging the tracks to the piece to create a long-form work that maintains the meditative qualities of the movie; then an early score proposal and more active concept than the final work, developed with recordings of improvisations from cellist Peter Hollo.

Ultimately it's Martin KŸchen's saxophone improvisations that lead these sensitively moody environments built around multi-tracked tapes of ambiance from snare, speaker, radio and tambora (a 2-headed drum) used unusually to create subtle and spacious drone environments over which KŸchen performs, hauntingly, emotionally and beautifully captivating his listeners.

Performed with Stockholm musicians including pianist Alexander Zethson, wind player Martin Küchen and trombonist Mats Äleklint, organist Linnéa Talp explores the areas of sound that emulate breathing, push/pull or back & forth motion, in eight beautifully paced recordings led by the organ's rich and microtonal vibrations & timbre and imbued by the contributor's subtle additions.

Delicate abrasions and corruption of their instruments from the NY duo of Erica Dicker (Till by Turning) on violin and Dennis Sullivan (Radical 2), 9 works of improvised soundscape and avant-raw chamber music through prepared strings, tapes, looped feedback, resonant metals, modified snares and liberally bowed surfaces, richly constrained and luxuriously blood-curdling.

Quebecois guitarist Bernard Falaise of Miriodor, Klaxon Gueule, Papa Boa and Les Projectionnistes fame, continues his solo series with the fifth note of the scale, "Sol (G)", reflected in a series of eight inventive guitar improvisations using timbral effects and looping structures to expand his virtual ensemble as does in his live performances.

Translating to "Blueberries and cat bells", Finnish electronic composer Olli Aarni's sound world is quick paced and surprisingly dense considering an overall feeling of brightness, sounds flashing and swirling by in strange segments of acousmatic exhilaration, pausing form moments before seizing his listener once more with swift streams of alien soundscapes; brilliant.

Hailing from Rotterdam's rich underground scene, the trio of Hugo Costa on alto sax, Goncalo Aleida on bass, and Philipp Ernsting on drums, with all 3 doubling on electronics, in a dramatic and energetic album blending free jazz, improv, metal, and punk music.

2nd Offering: Electroacoustic composer Michel Banabila compiles his dynamic works for dance & movement in this beautifully pressed limited double LP, presenting two 2019 works--'Dragonfly II' for "A Trace of Inevitability" (Yin Yue - Pennsylvania Ballet), and "Illicit Acquirement" for "Enough" (Patrick O"Brien - CUNY Dance Initiative)--and six prior pieces featuring his work with Conny Janssen Danst & Annabelle Lopez Ochoa.

Swiss musicians Marco Von Orelli (trumpet, slide trumpet) and Sheldon Suter (prepared drums) and by their Portuguese partners, Luis Lopes (electric guitar) and Travassos (electronics) release a new chapter in their project Big Bold Back Bone, all players embracing a unique electro-acoustic improvisation through transformation of their instruments.

Using material from solo live performances in San Francisco, Berlin, Zurich and London between 2010 and 2015, composer and sound artist Antoine Chessex developed the two compositions of this album, extracting his electroacoustic altered saxophone work and developing them into larger works that bridge extreme and psychoacoustics approaches with great sonic depth.

Two guitarists with unique approaches to their instruments -- Paris-based Julen Depsrez and Lisbon-based Luis Lopes -- in an experimental album of evolving sound through extreme modification of guitar sound and sustain, mysteriously building their interactions from whispering sonics to growling harmonics, tightly controlled but bristling with complex energy.

French sound artist Karbe Dinel creates a complex work of sound that shifts through diverse moods and seamlessly dovetailed sections, using synthesizer and effects to create deep resonating tones and high pitched complements, mysterious grainy ambience, haunting chambers of drifting electronics; a mysterious and compelling journey in the electronic realm.

The Toronto-based duo of Colin Fisher on woodwinds and percussion and Carl Didur on keyboards and bass bridge acoustic and electronic improv with science fiction sensibilities in their two part "Exegesis", a critical exposition of un-genred music that borrows from global sources in service to their unusual and exotic tale; a wonderfully perplexing album.

The 1st in SpleenCoffin's double-7" series, each featuring exclusive material and packaged in reclaimed 7" audio reel boxes, this volume featuring audio tracks by French synth duo FEMME; NYC's Sunk Heaven; a piece composed from a group recording of Jeph Jerman, Tim Barnes, Bill Hutson & Ten Byrnes; and a work from Romanian audio artist SOMNOROASE PĂSĂRELE.

Fritz Welch and Guido Hennebohl present a strange and discomforting album of electronic madness, as they "rattle them pots and pans, slap-the-cheek slurps and stick sharp elbows into a web of goof-off electronics" as they pursue the message of freedom.

Dale Gorfinkel is a multi-instrumentalist, improvisor, instrument creator and installation artist, creating unexpected aural environments exploring acoustic phenomena or creating acoustic sculptures using common materials like switches, balloons, hoses, cages, &c.

An assertive album of free playing from the trio of Peter Van Huffel on alto sax, Roland Fidezius on electric bass, and Rudi Fischerlehner on drums, giving the music punk-jazz overtones in sound and rhythmic approach while clearly adhering to the heavy free jazz styles of the European masters.

Composers and performers Jani Hirvonen and Johannes Schebler create a complex universe in sound & melody, a veritable forest of sound referencing global and spiritual environments, using warm instrumental sources, field recordings, world percussion and extended use of the studio in a satisfying series of journeys with a mysteriously transcendental and devotional feeling.

Washington, DC based electronic experimenter Chester Hawkins (Blue Sausage Infant) was commissioned by director Tim Ashby to compose this work for the soundtrack to his feature-length film "Pale Trees", Hawkin's music illustrating the film's gradient of psychological colors from darkness, rage, and vengeance through a mix of kosmische drone in a Tangerine Dream vein.

Describing their approach to their submersive electroacoustic music as a seance, the Czech Republic septet IQ+1 with Peter Vrba, George Bagdasarov, Veronika Hladka, Jana Kneschke, Michal Zboril, and Katerina Bilejova release their 3rd album, a mix of strings, trumpet, clarinet, harmonium, synth, electronics & field recordings, creating a virtual acousmatic music of great detail.

The 2nd release from Jason Kahn, here on voice and resonator guitar, with Christian Wolfarth on Chinese Cymbal, an antique marching snare and objects, recorded after a series of concerts across Europe in the fall of 2019, Kahn applying a percussionist's perspective to his guitar by playing it as a lap slide, as the two invoke an unusual incantatory spirit from their improvisations.