We started Freesound 15 years ago. Now we are building Freesound
Licensing, a platform to help sound creators monetize their sounds
by re-licensing them to people that need usage rights beyond the original Creative Commons restrictions.
We are the Music Technology Group (MTG), a research group of Universitat Pompeu Fabra.
Among many other projects, at the MTG we make Freesound (https://freesound.org), and we're starting now the Freesound Licensing project.