Why (original — Mix)

It helps DJs quickly identify the standard version of a song while browsing large libraries that may include "Dub Mixes," "Instrumental Mixes," or "VIP Edits".

A version containing all backing tracks and vocals except the lead vocal , essentially used for live performances where the singer performs the lead live. Why (Original mix)

Unlike other versions, the Original Mix usually contains the full structural elements of the track: It helps DJs quickly identify the standard version