RT Journal Article T1 Parametric model of spectral envelope to synthesize realistic intensity variations in singing voice A1 Molina, Emilio A1 Barbancho-Pérez, Isabel A1 Barbancho-Pérez, Ana María A1 Tardón-García, Lorenzo José K1 Procesado de señales AB In this paper, we propose a method to synthesize the natural variations of spectral envelope as intensity varies in singing voice. To this end, we propose a parametric model of spectral envelope based on novel 4-pole resonators as formant filters. This model has been used to analyse 60 vowels sung at different intensities in order to define a set of functions describing the global variations of parameters along intensity. These functions have been used to modify the intensity of 16 recorded vowels and 8 synthetic vowels generated with Vocaloid. The realism of the transformations performed with our approach has been evaluated by four amateurmusicians in comparison to Melodyne for real sounds and to Vocaloid for synthetic sounds. The proposed approach has been proved to achieve more realistic sounds than Melodyne and Vocaloid, especially for loud-to-weak transformations. YR 2014 FD 2014-05-28 LK http://hdl.handle.net/10630/7562 UL http://hdl.handle.net/10630/7562 LA eng NO 2014 IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP), pp. 634 - 638 NO This work has been funded by the Ministerio de Economía y Competitividadof the Spanish Government under Project No. TIN2010-21089-C03-02 and Project No. IPT-2011-0885-430000, by the Junta de Andaluc´ıa underProject No. P11-TIC-7154 and by the Ministerio de Educaci ón, Culturay Deporte through the ‘Programa Nacional de Movilidad de Recursos Humanosdel Plan Nacional de I-D+i 2008-2011, prorrogado por Acuerdo deConsejo de Ministros de 7 de octubre de 2011’. The work has been done inthe context of Campus de Excelencia Internacional Andalucía Tech, Universidadde Málaga. DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 19 ene 2026