The Polish trio OWL of Marcin Halat on violin, Maciej Garbowski on double bass, and Krzysztof Gradziuk on drums invited German pianist Pablo Held for a concert at Loft in Cologne, 2019, to perform three lyrical and dynamic compositions from violinist Halat, alongside a 6-part "IMPRO" collective improvisation, balancing free and lyrical approches to superb modern jazz.

As part of the Polish website Jazzarium.pl's 5th anniversary celebration, UK tenor saxophonist Evan Parker joined the Polish RGG free-improvising piano trio of Lukasz Ojdana on piano, Maciej Garbowski on bass, and Krzysztof Gradziuk on drums, for this four-part sophisticated collective improvisation recorded at the legendary Alchemia club in Krakow.