The buttons are pre-tuned to the exact frequencies for the key of the songs you are playing. The whammy should only be pressed when you are 'bending' the pitch, so if you have your hand resting on it while playing even just slightly it could cause an out-of-tune feel.
If you are creating your own songs in the studio, then you can choose the key you intend to use and that pre-tunes the buttons as needed. You can even create custom keys in that setup.
You may wish to validate the frequencies using a pitch pipe, but I think you will find that the digital programming prevents any possibility of it being out of tune.
Answers & Comments
The buttons are pre-tuned to the exact frequencies for the key of the songs you are playing. The whammy should only be pressed when you are 'bending' the pitch, so if you have your hand resting on it while playing even just slightly it could cause an out-of-tune feel.
If you are creating your own songs in the studio, then you can choose the key you intend to use and that pre-tunes the buttons as needed. You can even create custom keys in that setup.
You may wish to validate the frequencies using a pitch pipe, but I think you will find that the digital programming prevents any possibility of it being out of tune.