YouTube Music today is making official sound search, while acknowledging that it’s testing the “AI-generated conversational radio” for US Premium subscribers. The Hum to Search-adjacent capability is called “sound search” in YouTube Music. It simply lets you query YTM’s “catalog of over 100 million official songs by sound.” Some users had it in May before the feature was rolled back for whatever reason. Once available, you can tap the magnifying glass icon in the top-right corner of YouTube Musi...