Drums, bicycle wheels, magnets.
Many magnets mounted to spinning wheels repel magnets on the drumhead. The drumhead vibrates according to speed of wheel. As the wheel gradually slows, volume varies as frequencies move through phase relationships.
Drums, bicycle wheels, magnets.
Many magnets mounted to spinning wheels repel magnets on the drumhead. The drumhead vibrates according to speed of wheel. As the wheel gradually slows, volume varies as frequencies move through phase relationships.