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What is Linear Distortion?
Linear Distortion, is a form of signal processing error that creates no new frequencies beyond those that are present in the input signal. Linear Distortion changes the relationship of the size and relative timing of the frequencies that compose the input signal.
Nonlinear distortion differs from linear distortion in that does create new tones at the output. The changes in relative timing of various frequencies due to linear distortion are different from the changes in timing due to Jitter or FM distortion. FM distortion changes the timing within a tone, while linear distortion changes only the timing of the entire tone.
Linear and Nonlinear distortion are directly based on frequencies present in the input signal. If there is no input, then there will no errors at the output, due linear and nonlinear distortion.
Noise is a form of error that is not as directly related to the input signal. If there is no input, error due to noise will continue to be present at the output.
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