Roland Expression Pedal A electric guitar pickup is essentially similar to a powerful microphone coil. For many years, active microphones have already been wired with the style coil attached to the principal of the microphone's transformer, and perhaps not introduced to surface (‘floating'). The microphone's event is usually connected to the wire shield, that is connected to the mike amplifier's soil (see Rane's internet site for more discussion).
By and big, powerful microphones are extremely quiet products as a result of the mixture of transformer solitude and healthy, flying transmission lines all through, as well as protected, humbucking coils.
So why not instruments? Instruments are once overwhelmed by noise. Humbucking pickups are just a partial (though essential!) solution. Well-known solution would be to move the guitar collection to a healthy production, being a microphone. The same idea was printed this 2001 patent request like this Roland Expression Pedal?