Story behind the song
Every study is one minute long, octave is divided into more and more equal steps (5, 8, 11, 17, 26, 38 and 53). Works are contrasting by used material, sounds, expression, tempo and density. Only tuning and sounds were prepared in advance, all music was improvised and first attempt was final without any change. Due limitations in XG I had to use more MIDI channels for one sound for tuning with more notes in octave then 12, tune them differently and combine. Result is interesting because I could play live on keyboard only subsets of these tunings.