Two of Poland’s most accomplished musicians at one with the art of spontaneous improvisation here create their own musical genre to create their own space

Rather than being limited by the terms jazz and classical music, they dip into both with a spirit of enquiry and no little adventure to see where they end up. The result is a duo album of improvised chamber music that if committed to manuscript would never achieve the ease of execution, spontaneity of expression and engaging invention on display here. Monotony of tone is avoided by Możdżer’s use of three pianos – one grand tuned to 442 Hz, another to 432 Hz and a prepared upright, while Bałdych uses both violin and Renaissance violin (a deeper tonality, closer to a viola), and alternates between bowing and plucking – or pizzicato technique.

Of the 15 duets, all but three are credited to one or other of Bałdych or Możdżer, or to them both. ‘Gymnopdie’ begins with ‘Gymnopdie No. 1’ by Erik Satie, whose melodic boundaries are artfully pushed this way and that; Hildegard von Bingen, the polymath Benedictine Abbess who lived in the Middle Ages and is now the most recorded composer of sacred monophony, is represented with a perfect interpretation ‘O Ignee Spiritus’ and Josquin des Prez, the Renaissance composer by ‘La exploration sur la more d’Ockeghem’ that concludes this masterful recital. Whether it's jazz or not, doesn't seem to matter, it is music for music lovers, which include followers of jazz.