Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
No, not really. You can't do anything in software because the max level is the max level.
Sure you can. You just need to use an app that has gain adjustment. You can permanently adjust gain of MP3s with MP3Gain, foobar, Winamp etc. or you can use a media player that has a gain setting, like 1by1. You can't adjust gain too much though or else it will cause clipping.
http://www.makeuseof.com/tag/1by1-small-lightweight-portable-music-player-dropbox-windows/
That only helps for things not already normalized, ad in at the max level. 0dBFS is just all there is in a digital system. You can't go past it, no matter what. Given that most music these days isn't just normalized, but brick wall limited, increasing the gain will just clip the shit out of it.