[guitar] C tuning is a type of guitar tuning. The strings of the guitar are tuned two whole steps lower than standard tuning. The resulting notes can be described as either C-F-A♯-D♯-G-C or more often C-F-B♭-E♭-G-C. The tuning is commonly used by metal and hard rock artists to achieve a heavier, deeper sound. It also makes bending e...