What is guitar c standard tuning?

C standard tuning is a guitar tuning that involves lowering all strings by two whole steps. The resulting notes, from low to high, are C, F, Bb, Eb, G, and C. This tuning is often used in heavy metal and other aggressive styles of music, as it allows for heavier and deeper sounds.

One advantage of C standard tuning is that it can make complicated chord shapes easier to play by reducing the distance between frets. However, it may require thicker strings and adjustments to the guitar's intonation.

Some famous songs that use C standard tuning include "Sad But True" by Metallica and "The Blister Exists" by Slipknot.