Which groundbreaking music product was developed after its company collected extensive customer feedback about people wanting to carry their entire music libraries with them without the limitations of CDs or cassettes?

In the competitive world of music technology, customer feedback has dramatically influenced product development. Some innovations came directly from musicians and listeners voicing their needs, creating entirely new categories of products that changed how we experience music. This poll tests your knowledge of a pivotal moment when consumer insights transformed the music industry landscape.

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Apple iPod (2001)
Sony Walkman (1979)
Spotify's streaming platform (2008)
Beats by Dre headphones (2008)