Norwood is a Lyric Soprano, with a range spanning three octaves and five semitones. Equal temperament is the division of the octave in twelve equal semitones. All diatonic intervals can be expressed as an equivalent number of semitones. This scheme applies to intervals up to an octave (12 semitones). The standard Western chromatic scale has twelve equidistant semitones. A tritone is also commonly defined as an interval spanning six semitones. Modern yueqin have frets tuned in semitones. There are two types of pentatonic scales&colon; those with semitones (hemitonic) and those without (anhemitonic). In the chromatic genus, this is a minor third followed by two semitones. In meantone systems, there are two different semitones. All these intervals span four semitones. They are each closed under transpositions by 3, 6, or 9 semitones. Enharmonic intervals span the same number of semitones. It is defined by ascending intervals of two, three, two, two, and three semitones. These two numbers are from a list of consecutive integers assigned to consecutive semitones.