Which pioneering technique revolutionized music recommendation systems around 2015, allowing streaming platforms to recommend songs based on actual audio characteristics rather than just user behavior?

The music industry has been transformed by streaming platforms that use sophisticated recommendation algorithms to personalize user experiences. These systems analyze listening habits, preferences, and even contextual data to suggest new artists and songs. How well do you understand the technology powering your daily music discoveries? Test your knowledge about the recommendation systems that shape the modern music landscape!

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Deep neural networks analyzing raw audio waveforms
Blockchain-based collaborative filtering
Sentiment analysis of song lyrics
Social graph mapping of listener connections