A Single-Dimensional Interface for Arranging Multiple Audio Sources in Three-Dimensional Space

Kento OHTANI  Kenta NIWA  Kazuya TAKEDA  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E100-D   No.10   pp.2635-2643
Publication Date: 2017/10/01
Online ISSN: 1745-1361
Type of Manuscript: PAPER
Category: Music Information Processing
Keyword: 
single-dimensional interface,  auditory localization,  head related transfer functions (HRTFs),  spatial audio synthesis,  matrix dimension reduction,  

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Summary: 
A single-dimensional interface which enables users to obtain diverse localizations of audio sources is proposed. In many conventional interfaces for arranging audio sources, there are multiple arrangement parameters, some of which allow users to control positions of audio sources. However, it is difficult for users who are unfamiliar with these systems to optimize the arrangement parameters since the number of possible settings is huge. We propose a simple, single-dimensional interface for adjusting arrangement parameters, allowing users to sample several diverse audio source arrangements and easily find their preferred auditory localizations. To select subsets of arrangement parameters from all of the possible choices, auditory-localization space vectors (ASVs) are defined to represent the auditory localization of each arrangement parameter. By selecting subsets of ASVs which are approximately orthogonal, we can choose arrangement parameters which will produce diverse auditory localizations. Experimental evaluations were conducted using music composed of three audio sources. Subjective evaluations confirmed that novice users can obtain diverse localizations using the proposed interface.