A tritone is a musical interval that spans three whole tones, or six half steps. It is often described as having a dissonant sound, which can create tension in music. The tritone can be found in various musical contexts, including classical, jazz, and popular music, and is sometimes referred to as the "devil's interval" due to its unsettling quality. In Western music theory, the tritone can be represented by two notes that are either a diminished fifth or an augmented fourth apart. For example, the notes C and F# form a tritone. This interval plays a significant role in harmony and is commonly used in chord progressions to enhance emotional expression.