TC Electronic PolyTune Classic - Manual (Page 14)

14
Calibrate Pitch Reference
Default pitch reference is 440 Hz but you can calibrate from 435 to 445 Hz in one Hz steps. To change
the pitch reference; press both buttons on the rear panel once and then use the two buttons individually
to step up/down within the pitch reference. Enjoy the numeric indication in the display! - To return to
tuner mode, leave the buttons untouched for 2 seconds.
Activate Calibration Raise Pitch Reference Lower Pitch Reference
Miscellaneous
Automatic dim of display - in the lower right side of the display an Ambilight sensor detects the
strength of the surrounding light and automatically adjusts the display brightness accordingly. This way
you will always have appropriate brightness on the display under all conditions and this feature even
extends the battery life when max light is not necessary.
Indication of current settings - When inserting a jack cable to the input, the pedals status is
displayed. Default settings are: Tuning: E, Pitch Reference: 440 Hz, Display mode: Needle.