Hercules DJCONTROL INPULSE T7 Manual page 80

MIDI controls test
To test whether the DJControl Inpulse T7 controller's
MIDI controls are working (without using DJ software to
do so), try using the buttons or other controls that you
want to test out. If the DIN connector icon turns green,
this means that the MIDI command is being received
and the button or other control is working properly.
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