Spatial audio has become popular in recent audio applications. Traditional 2-ch stereo sources also provide rich spatial representation. The authors have previously proposed amplitude-based and phase-based crosstalk generators for earphones and headphones reproduction. The parameters for those crosstalk generators were optimized to perceptually generate the suitable stereo stage width compared with the binaural rendering. Investigating the dominant frequency range, which perceptually determines the stereo stage width, is essential in spatial audio. This paper discusses the frequency dependency of inter-channel cross-correlation for 2-ch stereo sources. The frequency dependency of inter-channel cross-correlation, of course, depends on each music source. Those characteristics are investigated for typical classical and vocal music sources to discuss the perceptual aspects of spatial audio.
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https://aes2.org/publications/elibrary-page/?id=22565
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