Detecting explicit lyrics: a case study in Italian music

Preventing the reproduction of songs whose textual content is offensive or inappropriate for kids is an important issue in the music industry. In this paper, we investigate the problem of assessing whether music lyrics contain content unsuitable for children (a.k.a., explicit content). Previous works that have computationally tackled this problem have dealt with English or Korean songs, comparing the performance of various machine learning approaches. We investigate the automatic detection of explicit lyrics for Italian songs, complementing previous analyses performed on different languages. We assess the performance of many classifiers, including those-not fully exploited so far for this task-leveraging neural language models, i.e., rich language representations built from textual corpora in an unsupervised way, that can be fine-tuned on various natural language processing tasks, including text classification. For the comparison of the different systems, we exploit a novel dataset we contribute, consisting of approximately 34K songs, annotated with labels indicating explicit content. The evaluation shows that, on this dataset, most of the classifiers built on top of neural language models perform substantially better than non-neural approaches. We also provide further analyses, including: a qualitative assessment of the predictions produced by the classifiers, an assessment of the performance of the best performing classifier in a few-shot learning scenario, and the impact of dataset balancing.