Music can make or break a TV show, movie or even an advertisement. In entertainment media, a perfectly selected song will complement the visuals and dialogue, and enhance the overall impact.

If you begin to notice more of those befitting songs in the coming months and years, a new web app released Wednesday could be the reason why. Extreme Music, a popular music production library, just introduced a new feature called Customix to its website.

Customix lets music supervisors quickly edit songs they plan to license. The app allows users to adjust the volume to individual elements of a track (vocals, drums, guitar, bass, etc.), change a song’s tempo without changing its pitch and edit the length of a song without cutting it into pieces.

Read and video clips here: http://mashable.com/2013/01/23/customix/