There is extra stimulation in the,Adrenalin,plesure,addictive and other fun sections of the brain by Freelancer sound. Those are the common ones that seem harmless. Fear and Fight or Flight can be controlled, but only to a limit. Ever get so into a game that, as an example, Lets say you are playing A very realistic ground based footsoldier/shooter, like "Call of Duty" or "Vietcong" and the sound stimulates the flight or flight ( all one ) section and by impulse, in a split second you are in the prone position,covering you're head waiting for bullets explosions and more bullets to happon awayfrom you're position. Well in Freelancer, Flight or flight is more contaied inside you're head, wich leads to stress for the most part, but also folly you're proformance. I have felt an impulse to trade,trade and trade even though i had more than 400,000 credits ( in the storyline ) It is the sound of credits flowing into my account, sevral things, addictive, plesure, and the area that has, Valor,greed and the Breakthru sect. The combat music, the more exotic and "cool", it is a very helpful stim in combat. But, sometimes when you are not, and the combat music is playing anyway, adverce, you may get tierd. Also, sound + some particular visuals = Hormones and stuff like that wich can be tourture, and or effect behavior. These have been a few ( a few compared too how many other sight,hearing, brain,sikie and mental effects ) on the Humans from Freelancer ( No offence to nonhumans ).