B Tuning or B Standard Tuning or Cb Tuning is the standard tuning for a seven string guitar, where the strings are tuned B-E-A-D-G-B-E. B tuning can also be achieved on a six string guitar, when the strings are tuned B-E-A-D-F♯-B, known then as Baritone Tuning. This tuning is popular among several different types of metal bands.