The stems of "Billie Jean" refer to the individual audio tracks used to create the final mixed version of the song. The following is a breakdown of the stems:

An analog synthesizer bass (Minimoog) provides the warm, sub-heavy undercurrent.

In conclusion, the stems of "Billie Jean" offer a fascinating glimpse into the creative process behind one of pop's most iconic songs. By isolating and emphasizing individual elements, Quincy Jones and Michael Jackson were able to craft a sound that was both innovative and timeless.