These custom audio modes are specific to particular games and have been developed by the Sound designers / engineers that developed the game's sound. (blog.us.playstation.com)
Music sounds full, heavy on the low end, and clear on the top end even when disabling the Beats audio mode on the handset or using the headphones with other devices. (bgr.com)
One other noteworthy feature of the LCD screen in audio mode is the Background option that lets users choose one of three graphical backgrounds when playing music. (cnet.com)