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C6 tuning is one of the most common tunings for steel guitar, both on single and multiple neck instruments. On a twin-neck, the most common set-up is C6 tuning on the near neck and E9 tuning on the far neck.
On a six-string neck, for example, on lap steel guitar, C6 tuning is most usually C-E-G-A-C-E, bass to treble and going away from the player. Some other six-string C6 tunings are:
A-C-E-G-C-E.
G-C-G-A-C-E.
E-C-G-A-C-E.
E-G-A-C-E-G.
C-A-C-G-C-E
On an eight-string neck, for example, on a console steel guitar, popular C6 tunings are:
High C6 tuning A-C-E-G-A-C-E-G.
Low C6 tuning either:
G-A-C-E-G-A-C-E.
F-A-C-E-G-A-C-E.
On a ten-string neck, typical of pedal steel guitars, a popular C6 tuning is C-F-A-C-E-G-A-C-E-G, adding two bass strings to the high eight-string tuning, or one string on either side of the F-bass low tuning. This is sometimes called the "Texas tuning". Another frequent variant is the reentrant C-F-A-C-E-G-A-C-E-D.
References
Borisoff, Jason (September 27, 2010). "How Pedal Steel Guitar Works". makingmusicmagazine.com. Making Music Magazine. Retrieved September 1, 2017.
