Four string improviser convene at Ulrichsberger Kaleidophon, in Germany in 2021, two of them from Germany--Dietrich Petzold on violin, viola, clavichord & bowed metal, Matthias Bauer on double bass--and the Portuguese father/son complement of improvisers--Ernesto Rodrigues on viola and Guilherme Rodrigues on cello--for three works of delicately sinewy intersection & counterpoint.

Inspired by and using the same instrumentation as John Tchicai's seminal 60's free jazz band New York Art Quartet, since 2013 the Berlin Art Quartet of Matthias Schubert on saxophone, Matthias Bauer on bass, Matthias Muller on trombone, and Reinhard Bruggemann on drums, has carried on the spirit of NY Free Jazz, here in a live concert at B-Flat, in Berlin in 2019.

An album for bowed strings, bowed metal, and double bass, from the quartet of Dietrich Petzold on violin, viola, bowed metal, Ernesto Rodrigues on viola, Guilherme Rodrigues on cello, and Matthias Bauer on double bass, presenting a seven part suite recorded in the studio in Berlin, active and exciting music that bridges classical technique with free improvisation.

A 3 CD box set with a booklet and bow hair marking violinist/conceptualist Jon Rose's 60th birthday, all previously unreleased works ranging from radio documentary and radio fiction to virtuoso performances using acoustic violin and his hyperstring interactive bow system.