Take vocals out of a track

can somebody help me with making a song, a instumental… so i wanna take out the vocals!
can someone explain me that?
Grtz Omagic

Note that vocal removal only sometimes works - often it doesn’t (depending on how it has been recorded).
See this tutorial: http://manual.audacityteam.org/man/Tutorial_-_Vocal_Removal_and_Isolation