How do you organise music for organic discovery? "We reduced our 30+ descriptors to just eight β€˜human’ ones: aggressive, danceable, electronic, happy, instrumental, party, relaxed, sad. Each track being rated from -1 (not at all) to 1 (very) on each of those. We tried various combinations until we could see some separation between opposed genres (e.g. classical vs dance) but see similarity between others (e.g.funk and hip-hop) ..."