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Beauchamp, James W. Maher, Robert Crawford 2011-05-07T13:36:55Z 2011-05-07T13:36:55Z 10000-01-01 1989 "The simultaneous presentation of several sound sources in a performance setting is fundamental to most music. Ensemble musical signals consist of superpositions of multiple distinct sonic events which may or may not be synchronized in time, frequency, and/or amplitude. Once the distinct events are combined and recorded in a storage medium, e.g., a digital recording, the composite signal is often unsatisfactory in some way: the recording might suffer from poor ensemble balance, performance errors, or corruption from undesired background audience noises (sneezing, talking, etc.). Although it often might be helpful to process the constituent signals independently, separating the composite signal into its parts is a nontrivial task. The research reported here considers particular aspects of the separation problem: analysis, identification, tracking, and resynthesis of a specified voice from a digital recording of a musical duet setting. Analysis is accomplished out of real-time using a quasi-harmonic, sinusoidal representation of the constituent signals, based on short-time Fourier transform (STFT) methods. The procedure is evaluated via resynthesis of a ""desired"" signal from the composite analysis and tracking data. Other applications include signal restoration, digital editing and splicing, musique concrete, noise reduction, and time-scale compression/expansion. This material is based upon work supported, in part, under a National Science Foundation Graduate Fellowship. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author and do not necessarily reflect the views of the National Science Foundation." Made available in DSpace on 2011-05-07T13:36:55Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 8924891.pdf: 4298723 bytes, checksum: 67f4e2019efbf300ef590334393c3e3b (MD5) Previous issue date: 1989 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:56:59Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:26:41-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI8924891 (UMI)AAI8924891 http://hdl.handle.net/2142/22345 eng Copyright 1989 Maher, Robert Crawford Music Engineering, Electronics and Electrical Physics, Acoustics An approach for the separation of voices in composite musical signals text Music Electrical and Computer Engineering Electrical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.