[ssalazar]

I have no specific insider knowledge, but a decade+ ago they bought a company called the Echo Nest that was developing some of the best audio signal analysis algorithms around, I assume much of that influenced their recommender system.

Nowadays, they have a quite busy research department so I would imagine that recommendation is quite fancy indeed: https://research.atspotify.com

[aworks]

Glenn McDonald, formerly of the Echo Nest and Spotify, has a new book that talks a lot about music recommendations.

https://www.canburypress.com/products/you-have-not-yet-heard...