"Characterisation of Distortion Profiles in Relation to Audio Quality" (Proc. of the 17th Int. Conference on Digital Audio Effects (DAFx-14), Erlangen, Germany, September 1-5, 2014, http://www.dafx14.fau.de/papers/dafx14_alex_wilson_categorisation_of_distort.pdf ):
"Since digital audio is encoded as discrete samples of the audio waveform, much can be said about a recording by the statistical properties of these samples. In this paper, a dataset of CD audio
samples is analysed; the probability mass function of each audio clip informs a feature set which describes attributes of the musical recording related to loudness, dynamics and distortion. This
allows musical recordings to be classified according to their “distortion character”, a concept which describes the nature of amplitude distortion in mastered audio. A subjective test was designed
in which such recordings were rated according to the perception of their audio quality. It is shown that participants can discern between three different distortion characters... This expands upon previous work showing links between the effects of dynamic range compression and audio quality in musical recordings, by highlighting perceptual differences."
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