Using musical relationships between chord labels in automatic chord extraction tasks

Abstract : Recent research on Automatic Chord Extraction (ACE) has focused on the improvement of models based on machine learning. However, most models still fail to take into account the prior knowledge underlying the labeling alphabets (chord labels). Furthermore, recent works have shown that ACE performances have reached a glass ceiling.Therefore, this prompts the need to focus on other aspects of the task, such as the introduction of musical knowledge in the representation, the improvement of the models towards more complex chord alphabets and the development of more adapted evaluation methods. In this paper, we propose to exploit specific properties and relationships between chord labels in order to improve the learning of statistical ACE models. Hence, we analyze the interdependence of the representations of chords and their associated distances, the precision of the chord alphabets, and the impact of performing alphabet reduction before or after training the model. Furthermore, we propose new training losses based on musical theory. We show that these improve the results of ACE systems based on Convolutional Neural Networks. By analyzing our results, we uncover a set of related insights on ACE tasks based on statistical models, and also formalize the musical meaning of some classification errors.
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https://hal.archives-ouvertes.fr/hal-01875784
Contributeur : Jérôme Nika <>
Soumis le : lundi 17 septembre 2018 - 17:43:19
Dernière modification le : dimanche 7 octobre 2018 - 01:11:10

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  • HAL Id : hal-01875784, version 1

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Tristan Carsault, Jérôme Nika, Philippe Esling. Using musical relationships between chord labels in automatic chord extraction tasks. International Society for Music Information Retrieval Conference (ISMIR 2018), Sep 2018, Paris, France. 2018, 〈http://ismir2018.ircam.fr〉. 〈hal-01875784〉

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