Abstract
AbstractMusic is widely perceived as expressive of emotion. However, there is no consensus on which factors in music contribute to the expression of emotions, making it difficult to find robust objective predictors for music emotion recognition (MER). Currently, MER systems use supervised learning to map non time-varying feature vectors into regions of an emotion space guided by human annotations. In this work, we argue that time is neglected in MER even though musical experience is intrinsically temporal. We advance that the temporal variation of music features rather than feature values should be used as predictors in MER because the temporal evolution of musical sounds lies at the core of the cognitive processes that regulate the emotional response to music. We criticize the traditional machine learning approach to MER, then we review recent proposals to exploit the temporal variation of music features to predict time-varying ratings of emotions over the course of the music. Finally, we discuss the representation of musical time as the flow of musical information rather than clock time. Musical time is experienced through auditory memory, so music emotion recognition should exploit cognitive properties of music listening such as repetitions and expectations.KeywordsMusicTimeEmotionsMoodAutomatic Mood ClassificationMusic Emotion Recognition
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