Joan Clarke, woman who cracked Enigma cyphers with Alan Turing. Read more about sharing. Joan Clarke's ingenious work as a codebreaker during WW2 saved countless lives, and her talents were formidable enough to command the respect of some of the greatest minds of the 20th Century, despite the sexism of the time.
A semitone, also called a half step or a half tone, is the smallest musical interval commonly used in Western tonal music, and it is considered the most dissonant when sounded harmonically. It is defined as the interval between two adjacent notes in a 12-tone scale (e.g. from C to C â¯).9-tone equal temperament distinguishes between the chromatic and diatonic semitones; in this tuning, the chromatic semitone is one step of the scale (play 63.2 cents (helpÂ·info)), and the diatonic semitone is two (play 126.3 cents (helpÂ·info)).
A semitone (or half step in the USA) is the smallest distance between two different notes. Let's use the piano keyboard to look at some examples of semitones. If two notes are as close as possible on the piano keyboard, the distance between them is a semitone. Find E and F next to each other on the piano keyboard.