This study describes a listening experiment designed to further examine the previously proposed luminance-texture-mass (LTM) model for timbral semantics. Thirty two musically trained listeners rated twenty four instrument tones on six predefined semantic scales: brilliance, depth, roundness, warmth, fullness, and richness. These six scales were analyzed with Principal Component Analysis (PCA) and Multidimensional Scaling (MDS) to produce two different timbre spaces. These timbre spaces were subsequently compared for their configurational and dimensional similarity with the LTM semantic space and the direct MDS perceptual space obtained from the same stimuli. The results showed that the selected semantic scales are adequately representing the LTM model and are fair at predicting the configurations of the sounds that result from pairwise dissimilarity ratings.
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