Apple Music Lossless Audio to Coming to HomePod with Software Update
Dolby Atmos also coming, reveal support documents from Apple.
lossless audio
iOS 11 to Support FLAC Playback for iPhone X, iPhone 8, and iPhone 8 Plus
Free Lossless Audio Codec (FLAC) brings the full quality of the original recording via lossless compression of digital audio at the expense of storage and bandwidth.