Which music streaming service introduced a two-note piano sound logo in 2019 that replaced their previous three-tone whistle, as part of a major rebranding effort to create a more minimalist audio identity?

Sound logos (audio signatures) have become as important as visual logos for music streaming services and audio brands. These short musical phrases create instant brand recognition in a competitive industry. Test your knowledge about these sonic identities that have become part of our daily listening experience and how they've revolutionized audio branding in the digital streaming era.

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