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Remixing music using source separation algorithms to improve the musical experience of cochlear implant users

Title Remixing music using source separation algorithms to improve the musical experience of cochlear implant users
Publication Type Journal Article
Year of Publication 2016
Authors Pons, J. , Janer J. , Rode T. , & Nogueira W.
Journal Title The Journal of the Acoustical Society of America
Volume 140
Issue 6
Pages 4338--4349
Journal Date 12/2016
Abstract Music perception remains rather poor for many Cochlear Implant (CI) users due to the users' deficient pitch perception. However, comprehensible vocals and simple music structures are well perceived by many CI users. In previous studies researchers re-mixed songs to make music more enjoyable for them, favoring the preferred music elements (vocals or beat) attenuating the others. However, mixing music requires the individually recorded tracks (multitracks) which are usually not accessible. To overcome this limitation, Source Separation (SS) techniques are proposed to estimate the multitracks. These estimated multitracks are further re-mixed to create more pleasant music for CI users. However, SS may introduce undesirable audible distortions and artifacts. Experiments conducted with CI users (N = 9) and normal hearing listeners (N = 9) show that CI users can have different mixing preferences than normal hearing listeners. Moreover, it is shown that CI users' mixing preferences are user dependent. It is also shown that SS methods can be successfully used to create preferred re-mixes although distortions and artifacts are present. Finally, CI users' preferences are used to propose a benchmark that defines the maximum acceptable levels of SS distortion and artifacts for two different mixes proposed by CI users.
preprint/postprint document http://hdl.handle.net/10230/37267
Final publication http://dx.doi.org/10.1121/1.4971424
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