AirPlay 2 Apple AirPlay 2

What AirPlay 2 is

AirPlay 2 is the second generation of Apple's wireless streaming protocol. Wikipedia reports it was announced at WWDC on June 5, 2017, delayed, and launched with iOS 11.4 in May 2018. It improved buffering over the original, added control through Control Center, the Home app, and Siri, and introduced multiroom playback and stereo pairs of speakers such as two HomePods. Apple's AirPlay page splits it into three jobs. Video: share almost any video, photo, or presentation to an Apple TV 4K or AirPlay-enabled smart TV. Audio: play to HomePod, HomePod mini, or AirPlay-enabled speakers. Mirroring: show what is on an Apple device on a larger screen.

The protocol runs over your local network, not Bluetooth. Wikipedia lists the connection as Wi-Fi or Ethernet. That makes it independent of HDMI: an AirPlay TV receives the stream itself, with no cable from the phone, and quality depends on your network.

How multiroom and buffering work

Apple says multiple speakers can play in sync and different rooms can play different songs, or one room can play music while another streams a podcast. Apple's Apple TV guide adds that Apple TV 4K can send audio to one or more AirPlay devices, grouped by the rooms you set up in the Home app. Apple's page states no maximum number of speakers, so I am not quoting a device limit that I could not verify.

Synchronization depends on buffering. Wikipedia states that audio streams buffer for about two seconds before playback, which causes a small startup delay. That is fine for music and wrong for anything with lips on screen, which is why a movie played from a TV's own app should reach the soundbar over HDMI eARC, not AirPlay. Apple's guide reflects this: some receivers and smart TVs appear twice, once as Receiver Speakers over HDMI and once as AirPlay speakers, and Apple says to choose Receiver Speakers for the best audio quality, with a calibration step if you hear echo or delay. For the delay side, see lip-sync audio delay, and for the HDMI path, eARC.

Audio limits: sample rate and lossless

The audio path has a ceiling. Cambridge Audio's support FAQ, last revised in October 2026, says AirPlay supports a maximum of 44.1 kHz/16-bit, and that Apple Music streamed to its network players over AirPlay arrives at 44.1 kHz/16-bit AAC. Wikipedia describes the AirPlay 2 audio stream differently: Apple Lossless at 44.1 kHz with two channels, encrypted with AES. Apple's own lossless page says Hi-Res Lossless is available on Apple TV 4K (3rd generation or later) and that playback above 48 kHz generally needs an external DAC, and it does not describe AirPlay behavior at all. So the safe reading is that the ceiling is 16-bit/44.1 kHz, and whether a given app sends lossless or AAC within that ceiling varies by app and cannot be assumed.

The size of the ceiling is easy to compute. Stereo 16-bit/44.1 kHz audio is 44,100 times 16 times 2, or about 1.41 Mbps uncompressed. A 24-bit/96 kHz stereo file is 96,000 times 24 times 2, or about 4.6 Mbps, more than three times as much data. Per Cambridge Audio's description of the cap, material above it does not reach an AirPlay speaker at full resolution, so a hi-res setup should look at a wired or native-network path (see wireless audio protocols). Apple also notes that Bluetooth connections are not lossless; see Bluetooth audio codecs.

Dolby Atmos over AirPlay

Atmos arrived late. In June 2024, Apple said AirPlay adds Spatial Audio, including support for Dolby Atmos, for streaming from iPhone and iPad to HomePod and compatible third-party audio equipment. Apple's current page spells out the conditions: an iPhone or iPad on iOS or iPadOS 18 or later, a third-party app, a compatible receiving device, and compatible content, with no support on macOS. The page says many AirPlay speakers support it but does not publish a list of which ones. I could not load a source that confirms Atmos over AirPlay on a specific third-party soundbar or receiver model, so check the speaker maker's spec sheet. For HDMI-based Atmos, see Dolby Atmos and DD+ JOC.

Which TVs, receivers, and speakers support it

Apple's page shows Samsung, LG, Sony, and Vizio as TV makers with AirPlay built in, and Wikipedia records that these four announced AirPlay 2 sets at CES 2019, with LG naming OLED, NanoCell SM9X, UHD UM7X, and NanoCell SM8X for 2019. Roku added AirPlay 2 in September 2020 on select 4K devices, per Wikipedia. Apple warns that some Siri features need HomeKit and are not available on Samsung smart TVs.

On the audio side, Apple's page names 15 speaker and receiver brands: Bang and Olufsen, Bluesound, Bose, Bowers and Wilkins, Denon, Harman Kardon, IKEA, JBL, KEF, Libratone, Marantz, McIntosh, Naim, Sonos, and Yamaha. Brand listing is not model listing. I could not load a current per-model table from Apple, so confirm that a specific TV, AVR, or soundbar carries AirPlay 2 on its spec sheet. For the broader receiver ecosystems, see Denon HEOS vs Yamaha MusicCast and the apartment soundbar guide.

Common confusions

AirPlay 2 is not Bluetooth. It needs a network, and the stream goes through your router. It is not a replacement for HDMI ARC on a TV; the roughly two seconds of buffering that makes multiroom work also makes it unusable for lip-synced video audio. And a TV that supports AirPlay as a video receiver is not automatically an AirPlay audio speaker for the rest of the house. The sender needs to see it in the speaker list, and Apple's guide notes that some devices appear both ways. Treat AirPlay 2 as the music and casting layer of a home theater, and use cables for the film soundtrack.