Click on the "AVS Audio Editor" icon on your desktop. If you don't have a desktop shortcut, click "Start," "Programs" and select it from there, if using a PC. If using a Mac, open it from the "Applications" folder. It may take a few seconds for the program to fully load.
Click "File" and select "Open." Browse for the file containing the vocal audio to be removed. Once you locate it, click it to open.
Click on the vocal file in the AVS Audio Editor interface to highlight it. The vocal audio file is displayed as a sound wave graphic, containing a series of high peaks, smaller peaks and flat lines. High peaks represent loud signals, such as shouts or singing. Smaller peaks represent quieter signals such as talking and the flat lines represent silences. Use the sound wave as a visual guide when editing the audio.
Click "View" and select zoom. This enlarges the sound wave graphic of the vocal audio.
Hit "Play" and let the track roll. Hit "Pause" when you reach the part with the vocal to be removed.
Click "Tools" and select "Trim." Click the cursor to the immediate right and left of the sound wave that corresponds to the vocal segment to be removed. Try to get the trim as tight as possible so you don't cut out vocal audio that you need. Once you've trimmed either side, the selected vocal audio is rendered as a separate file. Press "Delete" to remove it from the rest of the audio track.