Extract Vocals Audacity - How to Isolate Vocals from Mp3 using Audacity

Trying to isolate or extract vocals using Audacity ?  Using a process called a waveform match and track inversion you can extract vocals for free using Audacity. First you will want to make sure you have both the quality version of the song and instrumental so that you can extract and make the best acapella from your mp3. Second, make sure that the peaks of your waveforms match up perfectly before you invert the instrumental track. Inverting your track will esssentially cancel out the beat and isolate just the vocals of your song.  If your song and instrumental do not match perfectly you will get background feedback in your acapella.  This is another video tutoial by the how to mac.