Skip fretting
Skip fretting allows a player of a fretted stringed instrument to play in a higher EDO than would be possible if all the frets were included. In the simplest skip-fretting systems, the guitar skips every other fret.
The simplest example allows someone with an ordinary 12-edo guitar to tune to 24-edo, for instance by tuning 450 cents between every pair of adjacent strings. The even strings will in this case have half the notes, and the odd strings will have the other half.
- Some notation
Skip-fretting systems can be "isomorphic", with the same distance between every pair of adjacent strings, but they don't have to be. An isomorphic skip-fretting system can be described with three numbers: The EDO it allows one to play, the fraction of that EDO's notes on any particular string, and the number of steps in the EDO between adjacent strings. So, for instance, the system described above for playing 24-edo on a 12-edo guitar could be called a "24 2 9" system (9\24 being equal to 450 cents).
- Some skip-fretting systems