A tone generating system 100 has a motion detection terminal 11 and
a tone producing device. The Motion detection terminal 11 has a motion sensor
MS which is attached to the back of a hand, and transmitting unit 11a.
The Motion sensor MS detects a torsional motion of the hand to which it is
attached. The Transmitting unit 11a transmits motion information
on the torsional motion. A Tone producing device 10 receives the motion
information, generates control information based on the motion information, and
produces a tone on the basis of the control information.
