An improvising string quartet with Creative Sources label leader Ernesto Rodrigues on viola, Guilherme Rodrigues on cello, German violinist and violist Dietrich Petzold and German double bassist Jan Roder, recording in the studio in Berlin in 2018 for seven active improvisations with a chamber feel, each named by the letters making up the word "PICTURE".

Schwarm, or "Swarm", 13 is a German ensemble performing instant compositions, directed by clarinetist Rudi Debrunner and saxophonist Max Stehle, who also provides conceptions for the band, which is comprised of reeds, guitar, violin, viola, cello, piano, percussion, double bass, and voice, presenting (appropriately) 13 improvisations captured live at Studioboerne45.

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.

Emulating the sounds and intentions of cranes through string improvisation and unusual techniques, the quartet of Estonian violinist Elo Masing, German violinist Dietrich Petzold, and Portuguese violist and cellist Ernesto and Guilherme Rodrigues name each of 8 tracks on the behavior of cranes, from forming a flock, migration, fighting, ritual dancing, to nesting.

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