Drop tuning is a guitar tuning technique where one or more strings are lowered in pitch, typically to create a heavier sound. The most common form is Drop D tuning, where the sixth string is tuned down a whole step to D, allowing for easier power chords and a deeper tone. This method is popular in various music genres, especially in rock and metal. Musicians often use drop tuning to achieve a more aggressive sound and to simplify finger positioning for certain chords. It can also enhance the resonance of the guitar, making it suitable for heavy riffs and chugging patterns. Many famous guitarists, including those in grunge and hard rock bands, frequently employ this technique.