https://techcrunch.com/2019/11/21/splice-sample-store/

Splice is blowing up like a hit song. The audio sample marketplace has doubled revenue and user count in a year, and now reaches 3 million musicians. 70% of those visit weekly to hunt down the freshest and trendiest sounds that give their tracks that special something, and many pay $7.99 for unlimited access.

But words can’t always describe music. Searching by genre and subjective tags can take forever and leave artists frustrated when the sounds they find they don’t resonate right. So Splice has taught a machine learning algorithm to draw connections between samples. That allows it for the first time to recommend Similar Sounds to one a musician is currently listening to, based on their pitch, melody, rhythm, and harmonic profile. Sometimes the similarities are surprising — something only a machine could hear.