Yamaha MT2X Authorized Product Manual page 33

MIXDOWN (TRACKDOWN)
It's now time for the mixdown. Often called "trackdown"
or "remix", mixdown is when all the four recorded tracks
are mixed to achieve a certain sound balance in level,
effects, and stereo positioning, and then recorded onto
one side of a cassette tape in mono or stereo. This tape
is the final "master".
— Signal Path During Mixdown —
3 1
In this next step, the instruments are "put in their place"
in the stereo sound field, and a slight amount of reverb
will be added to the vocal track with the SPX90.