I play Watch Dogs on the Xbox one and there the shots sound like they should sound like (everybody knows how they sound when you play it)
The CD I have also done in my girlfriend's Xbox and there have the weapons gaaanzz listened differently… More realistic, similar to GTA V. But came in missions hardly a sound when there's spoken in missions.
Your brother has set something in the Xbox settings, just was not paying attention like. Now the sound on your Xbox sounds exactly like mine. The way she should sound and not realistic anymore.
How do you set something like that? Where do I have to look? Would like to set the sound exactly as the gun sounds realistic.
So although I do not know what you mean by "realistic" to recognize but the sound sounds different than before, can't be said without more details.
Which source do you use as sound? The TV or external speakers are attached? Does your TV have a soundbar or is it even connected to a hi-fi system?
On the one hand, you have the opportunity to make various sound changes in the game. The sound settings of your output device also play a role. And last but not least you can only switch between HDMI and optical, optional stereo, Dolby Digital or DTS.