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Another limitation of using frets as a reference point is that even on guitar, moving up or down by a certain number of frets is not the only way to produce tones and semitones. We can use frets as an easy reference point, but it is really only one way of demonstrating intervals. These intervals can be played on the piano, trumpet, voice, or any other pitched instrument. It’s important to understand that the interval of a tone or a semitone is a measurement of pitch that is not specific to guitar. Easy right? Well, yes, but the truth is that using frets as a unit of measurement is a bit of a rough way of doing things.
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