Unless you've already tinkered with VLC Media Player's interface, you might not have noticed it at all. The equalizer is disabled by default in VLC media player software. This is a tool that allows you to control the output level of set frequency bands, which range from 60 hertz to 16 kilohertz. However, the default audio settings those devices come with are not always optimal, although audio enhancement features are built into some players specifically aimed at tweaking the sound for any listening environment. Users often assume when they are streaming songs, playing music videos or watching movies that their favorite media player is already set up to output audio in the best possible way.