Roland Digital Piano Line A electric guitar pickup is actually much like a powerful microphone coil. For many years, powerful microphones have been wired with the style coil mounted on the principal of the microphone's transformer, and not referenced to surface (‘floating'). The microphone's situation is normally attached to the wire shield, that will be linked to the microphone amplifier's soil (see Rane's web site for more discussion).
By and big, vibrant microphones are very quiet units as a result of the combination of transformer solitude and healthy, hanging sign lines during, along with shielded, humbucking coils.
Therefore why don't you instruments? Instruments are notoriously affected by noise. Humbucking pickups are just an incomplete (though essential!) solution. The obvious answer is always to move your guitar pickup to a balanced result, as being a microphone. The same strategy was published that 2001 patent request like this Roland Digital Piano Line?