Native Instruments MASCHINE MK3 - Page 643

Any audio source plugged into the first input of your audio interface will be available on the In 1 L input of MASCHINE, and
so on.
See ↑2.6.2, Preferences – Audio Page for more information on the Audio page of the
Preferences panel.
Using Effects
Applying Effects to External Audio
MASCHINE - Manual - 643