Removing instrumentals from a song to create an acapella version is easy with AudioDirector:
Launch AudioDirector on your computer
Open the Vocal Boost and Removal in Music tool under Audio Adjust
Drag the Music Volume slider all the way to -Inf
Click Preview to make sure that the track contains no instruments
Click Apply to confirm the track conversion
After extracting the instrumentals from the song, you can edit the vocal track to perfection using AudioDirector’s wide range of effects and audio adjustments.