“…The main exception is "Timbre," which is a relatively multimodal term. Rather than investigate a simple bi-polar comparison of one aspect of timbre, such as "Bright" vs. "Dark," it was decided to examine a higher-order aspect of timbre, "Naturalness of Timbre," a term that proved effective in evaluating perceptual differences between various 3D sound capture methods in two previous studies [26,39]. "Preference" was also included for investigation to enable a more direct comparison of the current study's findings with results from the study by Grewe et al [16] (see: SEC.…”