Deviations from an original sound that occur in the reproduction process. Harmonic distortion disturbs the original relationships between a tone and other tones naturally related to it. Intermodulation distortion introduces new tones that result from the beating of two or more original tones.
"Great job on the conversion. The 8-track tape I sent you had to be 30 years old and I never thought it could be salvaged. The quality of the sound is better than on the original! Thanks again."