Distortion and Noise
In engineering terms, dynamic range is the ratio between the largest and the smallest signals, and it is primarily wide dynamic range (not bandwidth) that distinguishes quality audio from rubbish. Provided that the largest signal is not clipped, maximizing dynamic range becomes a problem of minimizing the three unwanted signals that otherwise mask the smallest wanted signal: Distortion; Random noise; and Artificial interference, frequently referred to as Electromagnetic Compatibility (EMC). EMC is largely a construction issue and will be considered in Building Valve Amplifiers, so this chapter investigates how to minimize distortion and noise. To investigate and minimize distortion, ...