Double-click the desktop icon for your preferred digital audio workstation. Depending on how your workstation is configured, either the last used session or a blank session opens automatically.
Call up the relevant session for vocal audio extraction. The command process varies slightly among programs, but the option for opening a work-in-progress is typically located in the File menu. For example, in Logic click "File," "Open Recent" and select the session from the drop-down menu.
Close down blank or irrelevant recent sessions when prompted.
Import the song from which the vocals are to be extracted. Typically, the import command is located in the File menu. Once imported, the audio opens in a new audio channel.
Open the equalizer tool. This is typically located in the "Effects" or "Tools" menu, depending on which program you use. The equalizer lets you hone in on specific frequency bands. Click "Play" so you can hear the equalizer's influence in real time.
Click on the equalizer curve. The equalizer interface has an array of slider dials and a grid. Inside the grid is a curve that represents the audio's frequency spectrum. The vertical grid axis represents the volume level, and the horizontal axis represents the frequency. Drag the curve around the grid. This process boosts different frequency bands. The human voice typically sits between 80Hz and 80KHz. This is a large frequency range, so move the curve around slowly in-between these two markers on the horizontal axis.
Release the mouse button to stop moving the curve as soon as the vocals become very loud. This means you've identified a frequency upon which the vocals are present.
Drag the "Gain" dial to zero. The "Gain" dial applies only to the highlighted frequency. Because vocals have a variety of frequencies, this process will only remove part of the vocal audio. Repeat this process three or four times to fully remove vocals from the audio.
Click on the first vocal audio channel in the workstation interface. This highlights it, meaning subsequent commands are applied only to that channel.
Click "Send To" and select "Bus 1." If "Bus 1" is grayed out, select the first available bus. In audio, a bus is a master mix channel where you route multiple audio channels to be mixed down as a single file. Click on each subsequent vocal channel, and send each one to the same bus.
Highlight the bus channel. Click "File" and select "Export As." Select "Wav." This renders the collective vocal audio files as a single, loss-less audio file.