DigiTech RP80 - Manual (Page 14)

Tuner
The Tuner in the RP80 lets you quickly tune or check the tuning of your guitar. Enter the
Tuner by pressing and holding both Footswitches simultaneously. The
tu briefly displays
indicating that you are in Tuner mode. To begin tuning, play a note on your guitar (the neck
pickup usually works best). The display shows the note being played. The Effect LEDs
indicate whether the note is sharp or flat. The right 6 red LEDs indicate the note is sharp
and should be tuned down. The left 6 red LEDs indicate the note is flat and should be
tuned up. The center Green LED indicates the note is in tune. Output is muted in Tuner
mode but you can rock the Expression Pedal to unmute and adjust the guitar volume.
When the Tuner is enabled, you can change your tuning reference.The default factory
setting is A=440 Hz. (displayed as 40). Press the Value Buttons to select alternate dropped
tunings. Alternate tunings are A = Ab (displayed as
Ab),A = G (displayed as G), and A = Gb
The display shows the note played.
LEDs to the left
of the EQ LED
indicate the note is flat.
LEDs to the right
of the EQ LED
indicate the note is sharp.