Midi Keyboard Workstations A electric guitar pickup is actually similar to a powerful mike coil. For decades, energetic microphones have already been wired with the voice coil attached to the principal of the microphone's transformer, and maybe not called to ground (‘floating'). The microphone's situation is typically linked to the cable shield, which can be attached to the mike amplifier's soil (see Rane's website for more discussion).
By and big, active microphones are very calm devices consequently of the mix of transformer isolation and balanced, suspended sign lines through the duration of, along with protected, humbucking coils.
So why not guitars? Instruments are notoriously plagued by noise. Humbucking pickups are only an incomplete (though crucial!) solution. The most obvious answer is to float practicing the guitar pickup to a balanced productivity, as being a microphone. An identical thought was published this 2001 patent program such as Midi Keyboard Workstations?