Half Rack Cases A guitar pickup is actually much like a vibrant microphone coil. For decades, powerful microphones have now been wired with the style coil attached with the primary of the microphone's transformer, and not referenced to floor (‘floating'). The microphone's case is typically linked to the cable shield, which will be linked to the mike amplifier's surface (see Rane's web site for more discussion).
By and large, vibrant microphones are extremely calm products consequently of the mix of transformer isolation and balanced, flying transmission lines throughout, in addition to shielded, humbucking coils.
Therefore why not guitars? Guitars are notoriously overwhelmed by noise. Humbucking pickups are only an incomplete (though important!) solution. The obvious alternative is always to move the guitar pickup to a balanced result, as being a microphone. A similar idea was printed that 2001 patent software such as Half Rack Cases?