Which music streaming service first introduced a distinctive sonic logo (audio signature) that became a cornerstone of their brand identity across all marketing channels?

In today's competitive music retail landscape, sonic branding has become a crucial element of marketing strategy. Major music platforms and retailers use distinctive sound elements to create memorable brand experiences. This poll tests your knowledge about how music companies leverage sonic branding techniques to enhance customer recognition and loyalty in the digital streaming era.

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Spotify, with their three-note ascending melody introduced in 2013
Apple Music, with their pulsing beat signature launched with the service in 2015
Amazon Music, with their whispered 'prime' vocal tag from 2016
Pandora, with their four-tone piano signature from 2010