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Subjective and Objective Evaluation of 9ch Three-Dimensional Acoustic Music Recording Techniques

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A study was undertaken to compare four different 9-channel three-dimensional acoustic music recording techniques, all optimized for capturing a solo piano. The four techniques range in design philosophy: spaced, near-coincident, and coincident. Results of a subjective listening test showed the two spaced techniques as being equally highly rated for the subjective attributes “naturalness of sound scene”, “naturalness of timbre”, and “sound source image size”. Listeners rated the coincident technique significantly lower than all other techniques under investigation for all perceptual attributes. Binaural recordings of the stimuli were analyzed using several different objective measures, some of which were found to be good predictors for the perceptual attributes “envelopment” and “sound source image size”.

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