Higher quality weapons give more stats multiplier.
Each type of integrator can boost a specific stat, doubling it temporarily (3 minutes per dose). The weapons you can buy are: swords, armors, shoulder armors, shields and belts, each one affecting a specific stat. There are different tonalities of burp, for a total of 2 octaves, diesis included. While having fun at the bar, softer music will help you to relax or dance, depending on what you decide to do.