A  physical-computing  composition  using  two ultrasonic sensors. MAXmsp and Arduino were used.​​​​​​​
This work interprets the sympathy between humans and  non-humans,  such  as  a  piano  player  and  a computer in the form of a musical ensemble called 'Duet'  and  'Trio.’  The  computer  converts  the movement  of  the  player's  arm  into  numerical values and sends out notes accordingly, just like a musician in an ensemble. The performer listens to  it  and  performs  an  improvised  duet performance. The 1st and 2nd movements are duets between a computer and a piano player. The final movement is a Trio style in which a computer, a piano player, and an additional player send out notes through a computer keyboard.
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