Conversely, adding a double sharp to any other note not sharped or flatted in the key signature raises the note by two semitones with respect to the chromatic scale. Source: Internet
For instance, an augmented third such as C–E spans five semitones, exceeding a major third (C–E) by one semitone, while a diminished third such as C –E spans two semitones, falling short of a minor third (C–E ) by one semitone. Source: Internet
For instance, a semiditonus (3 semitones, or about 300 cents) is not half of a ditonus (4 semitones, or about 400 cents), but a ditonus shortened by one semitone. Source: Internet
All these intervals span four semitones. Source: Internet
Critical bandwidth lies between 2 and 3 semitones at high frequencies and becomes larger at lower frequencies. Source: Internet
Due to a different tuning technique, the twelve semitones in this scale have two slightly different sizes. Source: Internet