Tunings Name - CFGCGCF

7 string tuning. The open notes C F G together belong to 5 separate keys. Open strum is bright and balanced, able to support the keys Ab Eb Bb F C. Each one just another step clockwise up the circle of fifths from the last. Very useful for tapping, repeated notes only a string or 2 apart on the same fret make parallel octave sliding very simple. Since the open position gives you access to so many different keys at once, it is possible to have open chord tuning for all 12 keys at 2nd fret capo minimum. I recommend learning the scale grids and chord shapes for the core Ab through C key positions. Then just add a capo to access more keys with the same shapes. Here is a little capo guide for all 12 keys available with open tuning with 3rd fret keys as a bonus (you can capo higher of course): Fret/Capo 0 = Ab Eb Bb F C 1 = A E B Gb Db 2 = Bb F C G D 3 = B Gb Db Ab Eb