is the act of taking a guitar or bass and removing it from standard tuning (eadgbe) and lowering the tones, To whats called a drop Tuning.
i play in a drop tuning
guitar tuning where the bottom string is a perfect fifth lower than the next string, enabling the guitarist to play a powerchord with only one finger. the other strings are tuned the same as standard tuning. mostly used in metal.
most common examples:
drop D: DADGBE
dro C: CGCFAD
drop B: BF#BEG#C#
drop A: AEADF#B
drop tuning songs.
drop D-moby dick by led zeppelin
drop C-most bullet for my valentine songs
drop B-duality by slipknot
drop A-psychosocial by slipknot