If you are referring to in-network, I've never had issues with FLAC files up to 24/192. Out of network, I use Plex and PlexAmp which can encode the same files

If you are referring to in-network, I've never had issues with FLAC files up to 24/192. Out of network, I use Plex and PlexAmp which can encode the same files to OGG for more mobile friendly streamging