Perceptual Evaluation of Vibrato Models
Vincent Verfaille, Catherine Guastavino, Philippe Depalle · 2005
We promote a clearer definition of vibrato(Seashore, 1932),based on a review of various vibrato features.We also propose a generalised vibrato effect generator that includes spectral envelope modulation,and a frequency-dependent hysteresis behaviour.We then investigate the influence of spectral envelope modulation on perceived quality with a double-blind randomized ABcomparison task.Eight participants listened to12pairs of sounds with vibrato matched for loudness.Each pair included one sound with constant average spectral envelope (identical amplitude modulation over all frequencies) and one with modulated spectral envelope (frequency dependent amplitude modulation).Participants were asked to choose which version sounded the most natural.The statistical analysis revealed a significant preference for sounds with modulated spectral envelope (p<0.001).Our results highlight the need to consider spectral envelope modulation for vibrato modelling.