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Experienced multimodal quality is often assessed using quantitative experiments disregarding participants' experienced quality factors. The goal of this paper is to explore multimodal quality by using both quantitative methods as well as qualitative methods. Monoscopic and stereoscopic visual presentation modes and related room acoustic simulations for small and large spaces were varied. The experiments were conducted using a 15" autostereoscopic display and a 4.0 loudspeaker setup. Experienced quality was measured using both quantitative evaluation and Free-Choice Profiling with 20 naive participants. The results show that participants were qualitatively able to differentiate variables, although no quantitative excellence of stimuli was identified. The results also show that individual sensorial preferences are part of any multimodal quality evaluation. Therefore, we recommend using mixed methods to help in understanding heterogeneous multimodal quality. Individual sensorial preferences need to be further examined to improve multimodal quality evaluation experiments.