Apple AirPlay supports 24-bit lossless audio but you can't use it

If AirPlay is limited to 16-bit CD-quality streams, how is the HomePod able to use AirPlay at a better-than-CD 24-bits?

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Feel like people need to read this about loseless : r/AppleMusic

Apple Takes Apple Music Sound Quality to the Next Level - TidBITS

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Sonos support for Apple Music's Lossless Audio

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Apple Music Lossless: What It Is, How It Works, and How to Use It

Apple's New $19 USB-C EarPods have Lossless Audio: How it works, Microphone quality and some other unanswered questions answered!, by Aditya Darekar, Technology Hits