Which design change did Spotify make to its logo in 2015 that signaled its shift from being just a music service to a broader audio platform?

The music industry has undergone massive digital transformation over the past two decades, with streaming services becoming the dominant way people consume music. As these platforms evolved, their visual identities changed to reflect shifting market positions and brand values. This poll tests your knowledge of how one major streaming service's logo design evolved during a critical period in its growth strategy.

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Changed from a light green to a brighter, more vibrant 'Spotify green' to increase visual impact across digital platforms
Added headphone imagery to emphasize the listening experience rather than just music content
Incorporated sound wave elements to visually represent their expanded podcast offerings
Switched from lowercase to uppercase lettering to project authority in the growing streaming market