Warp refraction
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Also known as the Warp Refraction Principle, warp refraction is a term coined by guitarist Jon Finn, in his 1999 publication, Advanced Modern Rock Guitar Improvisation. Warp refraction takes into account the major third tuning interval between the second and third strings. In other words, warp refraction is the inconsistent tuning anomaly which occurs on the second and third strings of the six string guitar. All of the other strings have have a fourth interval relationship and are tuned as such.
