Playing songs and videos is damn easy and enjoyable with vlc media player as vlc understands your needs. So, if you want to increase the listening voice of your audio and video songs to extent even greater than max volume, vlc is your answer. Yes, with vlc media player, sound of media files can be increased upto 400 % so you can easily enjoy even such media files whose sound is very low with vlc ultra smart volume management. If you ask me, I listen to songs very loud and sometimes even annoy my neighbours with songs playing via vlc on my amazing quality home theater system 
How to increase or double volume via vlc ?
It is very easy, just open the file using vlc player, press ctrl + up arrow key rapidly until it shows full bar in the right hand side.. Now listen at the enhanced sound. Another reason to love vlc media player..