Freesound is the largest Creative Commons audio repository, born as a research project at UPF Barcelona

Freesound (freesound.org) is a platform for sharing Creative Commons-licensed audio clips, started in 2005 as a research effort of the Music Technology Group at Universitat Pompeu Fabra (UPF), Barcelona. The original goal was to build a shared corpus for computational audio analysis research. It has grown to host over 430,000 clips uploaded by more than 20,000 contributors, downloaded over 145 million times by 9 million users. Freesound hosts field recordings, instrument samples, foley, speech, and music loops — but not finished songs. Its explicit purpose is audio building blocks for recombination, not finished-music distribution. Every sound on Freesound carries its own individual Creative Commons license chosen by the uploader.

Examples

A live-coder who needs a gunshot effect, a rainstorm, or a single piano note searches Freesound, checks the per-file CC license, and downloads only files with compatible licenses (e.g., CC0 or CC-BY for commercial use without attribution trouble).

Assessment

A student wants to use a Freesound sample in a commercially released track. Explain what they must check before downloading and why Freesound might have several different samples of the same sound type under different licenses.