Williams 88 Key Digital Piano A electric guitar pickup is basically just like a powerful mike coil. For decades, dynamic microphones have now been wired with the style coil attached to the primary of the microphone's transformer, and perhaps not referenced to ground (‘floating'). The microphone's event is usually connected to the cable shield, which will be connected to the microphone amplifier's soil (see Rane's website for more discussion).
By and big, powerful microphones are extremely calm products as a result of the mixture of transformer isolation and balanced, floating transmission lines all through, as well as protected, humbucking coils.
So why don't you instruments? Instruments are once plagued by noise. Humbucking pickups are merely a partial (though crucial!) solution. The most obvious solution would be to move the guitar pickup to a balanced output, as being a microphone. An identical thought was printed that 2001 patent application such as Williams 88 Key Digital Piano?