Musical rhythms played by humans are inevitably accompanied by small deviations from the exat beat pattern (typically on the order of 10-20 ms). These deviations exhibit so-called "long-range correlations (LRC)". Adding LRC to rhythmic beat patterns is called LRC humanizing. In contrast, professional audio editing software offers a humanizing feature which adds white noise (WN) to beat patterns, referred to as WN humanizing.
In this online survey created in collaboration with Prof. Theo Geisel, participants rated Bach music played by a computer: Invention no.1 (BWV 772) and Prelude no.2 (BWV 871). The musical pieces were modified in one of the following ways:
LRC humanizing is preferred over WN humanizing.
A) All 219 test persons
B) Subgroup: Professional musicians