Which innovative music recommendation technology was first implemented by Pandora in 2000, representing a breakthrough in personalized music discovery?

The music industry has been revolutionized by streaming services that use sophisticated product analytics and recommendation engines. These systems have fundamentally changed how listeners discover new music and how artists reach audiences. Test your knowledge about the technology and product innovation behind modern music streaming platforms and how they've transformed the industry landscape.

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Music Genome Project - a system manually analyzing 450+ attributes of each song by trained musicologists
Collaborative Filtering - a system that recommends music based solely on what similar users are listening to
Echo Nest Algorithm - a system that uses AI to analyze audio and web content to understand musical qualities
Neural Audio Mapping - a system that creates 3D visualizations of songs to match with listener preferences