The first movement from the Sonata for Tuba & Piano (2015).

Pawel Strzelecki: 1. Opening [Sonata for Tuba and Piano (2015)].

Polish Composer (M.A., 2002, "F. Chopin" Academy of Music in Warsaw,  Prof. Zbigniew Baginski's class), music theorist (M.A., 2000, "F. Chopin" Academy of Music in Warsaw, under Prof. Maria Piotrowska), musicologist (Ph.D., 2005, University of Warsaw, under Prof. Zbigniew Skowron), researcher, lecturer.
So far he has written 127 pieces: 12 symphonies (2017-2024), 3 symphonic poemes (2001-2011), 4 concertos with orchestra (organ, piano, two pianos, flute, 2002-2025), 22 string quartets (2001-2025), 17 sonatas for different solo instruments with piano (violin, cello, oboe, trombone, etc.), chamber music as Piano Trio (1998), Piano Quartet (2021), Piano Quintet (2003), String Trio (2021), numerous songs for voice and piano, sacred works, e.g. Mass for soloists, choir, organ and orchestra (2002, rev. 2024), and electronic music.  
The stylistic and technical parameters describes the text below:
https://pawelstrzelecki.wixsite.com/music
The author of the crucial, first and original book (used as academic manual and present in many libraries) on "New Romanticism" in Polish music after 1975, containing interview of the author with Krzysztof Penderecki (2022, English Language Edition).
https://www.peterlang.com/document/1282565?fbclid=IwAR1Pm40flHnsqH07OsvXdXwV1ZwLeVLOmfrxkqe3wxL5rsJioluBL-2FQ9M#document-details-anchor
Polish edition (2006):
https://mi.pl/pl/p/Pawel-Strzelecki-Nowy-romantyzm-w-tworczosci-kompozytorow-polskich-po-roku-1975/59

The book was quoted in: Andrea Bohlman: "Musical Solidarities. Political Action and Music in Late Twentieth-Century Poland". Oxford University Press, 2020, pp. 208, 266. The link to the quotation (p. 208):
https://books.google.pl/books?id=uNnBDwAAQBAJ&pg=PA208&dq=bohlman+nowy+romantyzm&hl=en&sa=X&ved=2ahUKEwjoyL-x-Lf4AhXOk4sKHUWMChUQ6AF6BAgEEAI#v=onepage&q=bohlman%20nowy%20romantyzm&f=false

Pawel Strzelecki: 1. Opening [Sonata for Tuba and Piano (2015)].

Pawel Strzelecki, Ph.D.