Interference

From DNBWiki

When current passes through a wire, the wire radiates some of the energy as radio waves. The frequency of the radio waves is determined by various factors, including the frequency of oscillation of the current and the length of the wire.

Similarly, a radio wave of a particular frequency can stimulate an oscillating current in a wire of an appropriate length - in this situation the wire is known as an aerial.

As analogue circuity processes signals in the form of voltage across components and current passing through them, the signals passing through them are thus susceptible to additive interference. Without careful circuit design and adequate shielding, interference can be a real problem in any studio as radio-waves produced by one piece of equipment induce unwanted interference in another. Computers can also be a major source of interference.

Digital signal processing does not suffer from this problem, although if the interference is extremely strong it may cause the piece of digital equipment to fail or crash.