Open your preferred audio production program, for example Logic, Cubase or Audacity.
Click "File" and click on the session to be edited.
Click on "Arrange" to open the Arrange window, where you view each audio and MIDI track as it appears in the session.
Click on "Play" and, starting with the top-most audio track, click "S." This mutes all other tracks. Listen to the track in isolation so that you can accurately name it. Click on the name box on the left of the channel strip and type in an unambiguous name for the track, for example "Lead Vocal 1" or "Guide Guitar 2." Naming each track reduces the chances of erroneously deleting a track that you want to keep.
Scroll the vertical navigation bar to the top of the Arrange window so you can view the tracks that were recorded first.
Double-click on the first instrumental track to highlight it. Press "Delete" on your keyboard. When prompted, confirm that you wish to permanently delete the audio. This process is irreversible.
Click on the now empty channel strip and press "Delete." This removes the channel and the settings that the audio was recorded to. If you are deleting a lot of audio tracks, this process will free up some memory and, depending on your machine, speed up the recording process.
Scroll the navigation bar down and double-click on the next instrumental track to be deleted. Delete the channel strip once the audio is removed.
Scroll the vertical navigation bar to the top of the Arrange window.
Click the "M" icon on the left of the channel strip for each instrumental. This mutes the track but doesn't remove it. This method is suitable to temporarily "hide" a piece of distracting audio while recording.
Scroll down in the arrange window and click "M" on subsequent instrumental tracks. Because the tracks are still in place, you can retrieve the audio or use the channel settings with ease.
Click "Tools," and then click "Scissors."
Double-click on an instrumental track to open the sample editor. This opens a wave form graphic. The wave form represents the audio in peaks, dips and flat lines.
Click "View," then "Zoom" to enlarge the wave form graphic.
Click the scissor tool on either side of the wave form peak representing the audio to be removed. This separates that audio from the rest of the track. Press "Delete" to remove this part of the audio.