Download Mixer Audio Amplifier Digital A guitar pickup is basically just like a powerful mike coil. For decades, energetic microphones have been wired with the voice coil attached to the primary of the microphone's transformer, and maybe not introduced to floor (‘floating'). The microphone's event is typically attached to the cable shield, which is connected to the microphone amplifier's ground (see Rane's site for more discussion).
By and big, powerful microphones are very calm devices as a result of the combination of transformer solitude and healthy, hanging indication lines through the duration of, in addition to protected, humbucking coils.
Therefore why not guitars? Instruments are once plagued by noise. Humbucking pickups are only a partial (though essential!) solution. Well-known answer would be to move the guitar pickup to a balanced result, as being a microphone. The same strategy was printed this 2001 patent program such as Download Mixer Audio Amplifier Digital?