1. A system for altering a user's motional response to sound delivered to the user, the system comprising: a current source; a sound source including data representative of at least one set of sounds; an information source including information associated with at least one characteristic of the at least one set of sounds; a sound device configured with a sound producing structure and in communication with the sound source and converting the data representative of the at least one set of sounds to sound, the sound being delivered to the user; a sensor device configured to detect motions associated with the user; a control program configured to receive data representative of the detected motions and to receive the information, the control program having a control algorithm configured to generate control data based on the data representative of the detected motions provided as closed-loop feedback from the sensor device and the information; a controller configured to run the control program and output control signals based on the control data; an adaptive system comprising an adaptive control loop outside the closed-loop feedback configured to automatically adjust parameters of at least one of the controller, the sensor device, the sound source, the information, or the control algorithm based on at least one of the detected motions and the information; and a vestibular stimulation device configured to deliver a current from the current source to the vestibular system of the inner ear of the user in response to the output control signals.