Is my Network Player compatible with M4A files? April 09, 2024 08:20 Yes, you will be able to play M4A files on your Network Player from a connected USB Drive or NAS Drive. Related articles What is the latest firmware version for the 851N? How do I configure my Network Player for use with locally stored music? (NAS, computer, etc.) What sort of NAS drive should I use with my Cambridge Audio streamer? StreamMagic App Will the Network Player default to a wired connection when connected to a router via Ethernet?