Multi Track Recorder A guitar collection is basically similar to an energetic mike coil. For decades, active microphones have now been wired with the voice coil attached with the primary of the microphone's transformer, and maybe not called to ground (‘floating'). The microphone's case is typically attached to the wire shield, which can be attached to the mike amplifier's ground (see Rane's web site for more discussion).
By and big, powerful microphones are extremely calm units as a result of the mix of transformer isolation and balanced, floating sign lines during, along with protected, humbucking coils.
So why don't you instruments? Instruments are notoriously plagued by noise. Humbucking pickups are merely a partial (though crucial!) solution. The obvious answer is always to move practicing the guitar collection to a balanced output, as being a microphone. An identical thought was published this 2001 patent software such as Multi Track Recorder?