An audio controller for generating a signal for alleviating motion sickness is described. The audio controller comprises a sensor input module, a user control input and a processor comprising a machine learning model corresponding to a desired audio stimulation profile. The machine learning model is coupled to the sensor input module and the user control input. The machine learning model is configured to receive a sensor signal comprising at least one user attribute and at least one context attribute from the sensor input module. The audio controller includes a stimulus generator coupled to the machine learning model. The machine learning model controls the stimulus generator to generate a reference signal for alleviating motion sickness and adapts the reference signal dependent on at least one of the user control input and the sensor signal.
