8 STRING - C STANDARD - GUITAR TUNING TONES 

THREE WHOLE Steps below factory standard 8 string tuning.
C--F--Bb--Eb--Ab--Db--F--Bb
(C--F--A#--D#--G#--C#--F--A#)
Tune your guitar using your 5th fret harmonics, 12th fret harmonics, or just the open string.