Published July 30, 2020 | Version 1.0
Dataset Open

Freesound Loop Dataset

  • 1. Music Technology Group, Universitat Pompeu Fabra
  • 2. TikTok
  • 3. Research Center for IT Innovation, Academia Sinica


Freesound Loop Dataset

This dataset contains 9,455 loops from and the corresponding annotations. These loops have tempo, key, genre and instrumentation annotation.

Dataset Construction

To collect this dataset, the following steps were performed:

  • Freesound was queried with "loop" and "bpm", so as to collect loops which have a beats-per-minute(BPM) annotations.

  • The sounds were analysed with AudioCommons extractor, so as to obtain key information.

  • The textual metadata of each sound was analysed, to obtain the BPM proposed by the user, and to obtain genre information.

  • Annotators used a web interface to annotate around 3,000 loops.

Dataset Organisation

The dataset contains two folders and two files in the root directory:

  • 'FSL10K' encloses the audio files and their metadata and analysis. The audios are in the 'audio' folder and are named '<freesound_sound_id>.wav'. The AudioCommons analysis of the loops is present in the 'ac_analysis' directory, while the Essentia analysis of the loops obtained through the Freesound API is on the 'fs_analysis' directory. The textual metadata for each audio can be found in the 'metadata.json'. Finally, the audio analysis provided by the algorithms which were benchmarked in the paper is on the 'benchmark' directory.

  • 'annotations' holds the expert provided annotation for the sounds in the dataset. The annotations are separated in a folder for each annotator and each annotation is stored as a .json file, named 'sound-<freesound_sound_id>.json', with a key for each of the features extracted.


All the sounds have some kind of Creative Commons license. The license of each sound in the dataset can be obtained from the 'FSL10K/metadata.json' file

Authors and Contact

This dataset was developed by António Ramires et. al.

Any questions related to this dataset please contact:

António Ramires


Please cite this paper if you use this dataset:

@inproceedings{ramires2020, author = "Antonio Ramires and Frederic Font and Dmitry Bogdanov and Jordan B. L. Smith and Yi-Hsuan Yang and Joann Ching and Bo-Yu Chen and Yueh-Kao Wu and Hsu Wei-Han and Xavier Serra", title = "The Freesound Loop Dataset and Annotation Tool", booktitle = "Proc. of the 21st International Society for Music Information Retrieval (ISMIR)", year = "2020" }


This work has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 765068 (MIP-Frontiers).


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Additional details


MIP-Frontiers – New Frontiers in Music Information Processing 765068
European Commission