Vox Valvetronix ToneLab SE - Manual (Page 62)

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C
ALIBRATING THE TUNER
When you switch ToneLabSE on, the built-in tuner is automatically calibrated to
A=440 Hz (a.k.a. “concert pitch”). If desired, you can recalibrate the tuner in the
range of A = 438 Hz–445 Hz.
• While the tuner is active, the value display (3.10) shows the frequency of the ref-
erence pitch. You can use the
▲, ▼ buttons to adjust (calibrate) this in the range
of 438 Hz–445 Hz.
NOTE: If you’ve recalibrated the tuner, remember that the setting will be automati-
cally reset to 440 Hz the next time you turn ToneLabSE on.