system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: how do people who remix a song isolate the vocals?
gpt
Professional remixers will have access to the original recordings which split the vocals and instruments onto different tracks.

Amateurs will use software to analyse the stereo master track and remove the instruments that are usually only in one channel, which leaves the vocal (which is usually in both the left and right channel).