Digital Piano P45 Transpose A guitar collection is actually similar to an energetic microphone coil. For many years, powerful microphones have been sent with the style coil attached to the primary of the microphone's transformer, and not referenced to ground (‘floating'). The microphone's situation is typically connected to the wire guard, which will be connected to the mike amplifier's floor (see Rane's website for more discussion).
By and big, energetic microphones are very quiet units as a result of the combination of transformer isolation and balanced, hanging indication lines for the duration of, along with guarded, humbucking coils.
Therefore why don't you instruments? Instruments are notoriously overwhelmed by noise. Humbucking pickups are merely a partial (though essential!) solution. The most obvious option is to move your guitar collection to a healthy output, as being a microphone. A similar idea was published that 2001 patent request like this Digital Piano P45 Transpose?