The H4n features a tuner with multiple tuning modes.
Press.
Select <CHROMATIC> and press.
The indicator shows the input signals are higher or lower than the
nearest one to the input signals.
HINT:
the tuning target.
NOTE:
Display of tuning
Relationship between string numbers and notes
High
T h e s e d o t s s h o w h o w
much gaps exist between
the input signals and the