Sonata for cello was written in the summer of 2006 for the eminent Polish artist, cellist Andrzej Bauer, to whom it is dedicated. Taking a quarter-tone as the 'elementary interval', the main themes of the work are based on two of the seven transpositions of the scale that are possible as a consequence of the alternating intervals: whole tone, 3/4 tone, whole tone, 3/4 tone. In order to obtain more precise intonation, the work is performed on a specially tuned instrument, where most of the sounds of this modus not enclosed in the octave, but closing in a fifth, are obtained with natural harmonics. [Pawel Mykietyn]