{"url":"/dataset/cal500exp","name":"CAL500exp","full_name":"CAL500 Expansion","description_markdown":"The **CAL500 Expansion** (**CAL500exp**) dataset is an enriched version of the CAL500 music information retrieval dataset. CAL500exp is designed to facilitate music auto-tagging in a smaller temporal scale. The dataset consists of the same songs split into 3,223 acoustically homogenous segments of 3 to 16 seconds. The tag labels are annotated in the segment level instead of track level. The annotations were obtained from annotators with strong music background.\n\nSource: [Towards time-varying music auto-tagging based on CAL500 expansion](https://doi.org/10.1109/ICME.2014.6890290)\nImage Source: [Towards time-varying music auto-tagging based on CAL500 expansion](https://doi.org/10.1109/ICME.2014.6890290)\nAudio Source: [http://calab1.ucsd.edu/~datasets/cal500/cal500data/](http://calab1.ucsd.edu/~datasets/cal500/cal500data/)","description_withheld":null,"homepage":"http://slam.iis.sinica.edu.tw/demo/CAL500exp/","introduced_date":"2014-01-01","introduced_date_note":null,"introduced_by":{"paper":null,"title":"Towards time-varying music auto-tagging based on CAL500 expansion","first_author":null,"url":"https://doi.org/10.1109/ICME.2014.6890290"},"license":null,"modalities":[{"name":"Audio","url":"/datasets/modality/audio"}],"tasks":[],"languages":[],"variants":["CAL500exp"],"data_loaders":[],"num_papers_in_archive":1,"source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28"},"benchmarks":[],"papers_with_a_benchmark_row":[],"syntology_totals":{"read_at":"2026-09-24T18:15:14+00:00","papers_with_samples":0,"samples_harvested":0,"samples_ran":0,"samples_unverified":0,"pointer_only_for_licence":0,"papers_with_no_sample_that_ran":0,"note":"the per-paper counts above, summed; not a rate"},"papers_note":"The archive never published its papers-using-dataset list; these are papers with a leaderboard row on this dataset's benchmarks."}