Midi Controller Drum A guitar pickup is essentially just like a dynamic mike coil. For decades, vibrant microphones have now been sent with the voice coil attached with the principal of the microphone's transformer, and not called to soil (‘floating'). The microphone's situation is typically connected to the wire guard, which will be attached to the mike amplifier's ground (see Rane's site for more discussion).
By and large, dynamic microphones are very quiet units consequently of the mix of transformer isolation and healthy, floating indication lines for the duration of, along with shielded, humbucking coils.
So why don't you instruments? Instruments are notoriously plagued by noise. Humbucking pickups are just an incomplete (though important!) solution. The most obvious solution is always to float practicing the guitar pickup to a balanced output, being a microphone. The same strategy was printed that 2001 patent application like this Midi Controller Drum?