Acoustic Overspecification in Electronic Dance Music Taxonomy

Electronic Dance Music (EDM) classification typically relies on industry-defined taxonomies with numerous subgenres, yet the acoustic basis for these distinctions remains unclear. Current approaches use supervised learning with prescribed genre labels, assuming their validity without systematic evaluation. In this paper, we propose an unsupervised approach to discover the natural acoustic structure of EDM independent of commercial labels. Our method combines novel tempogram-based features capturing EDM's layered rhythmic patterns with multi-criteria feature selection. To validate that our findings reflect genuine acoustic structure rather than methodological artifacts, we compare our results against state-of-the-art pre-trained audio embeddings (MERT and CLAP). Both our feature space and embedding representations converge to 19-23 natural acoustic families compared to the prescribed 35, providing consistent evidence of significant overspecification in current EDM taxonomy by approximately one-third.