Hi, I'm another researcher at the Music Technology Group, which runs Freesound. Definitely, this one of our long-time challenges.
Facilitating search and exploration is one of our main research directions related to Freesound. We do audio ML research, in particular, audio-based auto-tagging (see the already mentioned Freesound Datasets https://annotator.freesound.org/fsd/ we've built for this purpose) but also similarity and clustering based on audio analysis and tags.
So far, Freesound API provides similarity search and audio analysis features.
Facilitating search and exploration is one of our main research directions related to Freesound. We do audio ML research, in particular, audio-based auto-tagging (see the already mentioned Freesound Datasets https://annotator.freesound.org/fsd/ we've built for this purpose) but also similarity and clustering based on audio analysis and tags.
So far, Freesound API provides similarity search and audio analysis features.
Have a look at the Freesound Explorer, which is an example of a 2D sound exploration interface built on top of audio features: https://labs.freesound.org/apps/2017/08/21/freesound-explore...