Occasional "Easter eggs" like bar counts, rehearsal takes, or MJ speaking between recordings. The Scale of His Studio Work
For Michael Jackson’s work, these multitracks often include:
Individual tracks for the iconic basslines in songs like "Billie Jean," Eddie Van Halen's solo in "Beat It," and intricate synthesizer layers in "Human Nature".
In professional music production, a "multitrack" is a recording that keeps different instruments and vocal parts on separate lines rather than mixing them together into a final stereo file.