DigiTech HARDWIRE HT-2 Owner's Manual page 17

To tune your guitar or bass in Normal mode, do the following:
1. Press the Foot Switch to turn the tuner on. A dash appears in the
Note Display until a note is played.
2. Play a note with your instrument. The note being played displays in the
Note Display. If it is a sharp note, a decimal point lights in the lower
right of the note display (i.e. G. = G#).
3. Begin adjusting the tuning of your instrument based on the behavior of
the LED array. If LEDs to the left of the blue LED are lit, the note is flat
and needs to be tuned up. If LEDs to the right of the blue LED are lit,
the note is sharp and needs to be tuned down. When only the center
blue LED is lit, the note is in tune.
4. Continue to tune the rest of your strings in the same manner.
5. When tuning is complete, press the pedal Foot Switch to bypass the
Tuner.
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