A home-made sturdy wooden box (12"x14"x12") with a speaker bolted face down on the bottom. The speaker produces a lowlow tone -either constantly or rhythmically. at the top of the box is a series of light gauge guitar strings, strung across the length, tunes tight with "lute" style tuning pegs (the kind of small, square peg you would find in an auto-harp or hammer dulcimer). the strings are tuned however -to a scale, randomly, to a melody. Halfway down the box, across the center, a small board is mounted; and a small electric motor is mounted atop the board. Attached to this motor is a 8" metal rod, extending upwards, with a guitar pickup attached to the top. when the motor is engaged, the rod spins, and so the guitar pickup rotates in a circle just above the strings. This allows a rotary effect and ensures that all strings will be amplified. The speed of the motor is adjustable, and possibly MIDI-synched to the song's tempo. The speaker vibrates, the box vibrates, and so the strings vibrate. The guitar pickup "picks up" this vibration and sends the resulting tones to an amplifier.
*As a variation, the speaker can be omitted and the box can be placed atop a bass cabinet so that as a low bass note is played, the box reacts.
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