Which AI technique revolutionized music streaming recommendations around 2015-2016, allowing for more personalized discovery by understanding the actual audio content of songs?

Music streaming services have revolutionized how we discover and consume music, with artificial intelligence playing a crucial role in recommendation systems. These algorithms analyze your listening habits, preferences, and behaviors to suggest new artists and songs. But how much do you know about the technology powering these personalized music experiences? Test your knowledge about the AI revolution in the music industry!

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Deep neural networks analyzing raw audio waveforms
Sentiment analysis of user reviews and comments
Collaborative filtering based solely on user listening histories
Natural language processing of song lyrics