Applies to: Exact Apple TV 4K (3rd generation, 2022 Wi-Fi/64GB model), US Sony XR-55A80J and Sonos Beam Gen 2. Audio target: uncompressed two-channel PCM from a stereo track. Endpoint-document synthesis, not a manufacturer-tested combined system. No requested video timing/HDR upgrade, PCM sample-rate/bit-depth claim or on-device test.
- video
- Apple TV HDMI OUT -> HDMI cable -> TV HDMI input other than the return-channel port. Preserve an already supported video mode.
- audio
- Apple TV Stereo -> TV audio-system route -> TV ARC/eARC-labeled port -> included Beam HDMI cable -> Beam Gen 2 HDMI.
- data
- Sonos app/network setup and Apple TV content access are separate; no USB peripheral path.
- power
- Apple TV built-in supply and power cord; TV and Beam each use their own documented power connection.
What the path requires
- Confirm the exact Apple TV model and current tvOS menu. For this deliberately stereo task, select Settings -> Video and Audio -> Audio Format -> Change Format -> Stereo.
- Use a stereo audio track and a documented HDMI source-to-TV path. No service/title or Atmos availability is inferred.
- Reserve the TV ARC/eARC-labeled port for Beam and use its included HDMI cable. Sony recommends authorized Premium High Speed HDMI cabling for its return path; follow the exact equipment instructions.
- Select TV Speakers -> Audio system. Apply Digital audio out -> PCM where available. Sony disables this control for passed-through HDMI audio using eARC; the source Stereo setting remains essential and TV transcoding is not inferred.
- Set up Beam Gen 2 in the current Sonos app, not S1. HDMI-CEC is required for documented TV/voice control, but control success does not prove audio format.
- Read the incoming format in Sonos before relying on the result. Silence or another format leaves that part of the path unresolved.
A distinct format and receiver decision
For this stereo baseline, the selected source output and Beam input support two-channel PCM. An Atmos task has additional format and bandwidth conditions, while an optical route has different control and format limits. Choose the connection for the intended task and check the reported incoming audio format.
Play audio in Dolby Atmos or surround sound on your Apple TV 4K · Supported home theater audio formats · TV requirements for Sonos home theater speakers · Set up your Sonos BeamDo not assume the TV converts an unknown source
Apple documents Stereo as uncompressed two-channel PCM output for stereo tracks. Sony supplies audio-system/PCM settings but disables Digital audio out for a passed-through HDMI/eARC signal. Keep source setting and received format as separate checks; no TV conversion is inferred.
Play audio in Dolby Atmos or surround sound on your Apple TV 4K · Television Help Guide — Adjusting an audio systemThe internal-app Atmos question stays open
For a TV-internal app, the exact app/version, service tier, content audio choice and emitted format must still be established. Beam Gen 2 DD+/Atmos capability does not supply those missing source facts.
Supported home theater audio formats · TV requirements for Sonos home theater speakers · Set up your Sonos BeamWorked documentary examples
Deliberately stereo source with HDMI return audio
Documented outcome: Within documented endpoint format and role conditions; received audio unobserved
- Apple TV 4K third-generation Wi-Fi/64GB, stereo track, Change Format -> Stereo; selected XR-55A80J HDMI input and Audio system output; Beam Gen 2 app setup and independent power.
- Two-channel PCM only; no Atmos, multichannel PCM or unspecified app-format promise.
- Record models and current firmware/menu state. Connect Apple TV HDMI to a non-return-channel TV input; connect Beam to the labeled TV ARC/eARC port with its included HDMI cable.
- Select Apple Stereo and follow the applicable Sony Audio system/PCM instructions. A disabled PCM control in eARC passthrough is not a conversion step.
- Read the Sonos incoming format. Stereo PCM would establish that observed format in this setup; silence or another format leaves the path unresolved. This observation has not been made here.
TV internal app with an Atmos badge
Documented outcome: Missing exact app/content/output evidence
- The app/version, service/content format and actual TV output are unidentified.
- Record app and content audio choice and read the incoming format in Sonos.
- If Stereo PCM appears, do not relabel it Atmos or transfer the Apple TV high-bandwidth case.
- Keep DD+/Atmos conditional until exact source and TV output evidence is available.
Your next useful observation
Record Apple TV Audio Format, selected TV input/audio-output state, Beam incoming-format indication and actual content audio choice.
Keep these limits
- Endpoint documentation supports this scoped stereo format/role recipe. No combined-chain hardware, signal-format, video-mode, firmware, CEC or app test was performed.
- The internal-app DD+/Atmos branch retains missing source facts. No Sony PCM conversion is inferred while its setting is disabled under eARC passthrough.
Source documents, revisions and inspection methods
Play audio in Dolby Atmos or surround sound on your Apple TV 4K
Apple · Published March 24, 2026
Audio formats supported on Apple TV 4K: Change Format and Stereo; retrieved lines31-43
Inspected 2026-10-23 by public_page. Official primary HTML relevant paragraphs inspected with web open; AI-assisted source reading, no independent human review or hardware validation.
Manual Stereo setting sends uncompressed two-channel PCM for stereo tracks. No invented app/title, guaranteed TV conversion or tested combined chain.
Read the original sourceSupported home theater audio formats
Sonos · Live revision unavailable
All home theater products; Arc/Beam Gen2 eARC-only formats
Inspected 2026-10-23 by public_page. Primary HTML body or primary indexed specifications inspected; AI-assisted source reading, no independent human review or hardware validation.
Sonos format decoding and eARC requirements.
Read the original sourceTV requirements for Sonos home theater speakers
Sonos · Live revision unavailable
TV requirements; Dolby Atmos; surround sound
Inspected 2026-10-23 by public_page. Primary HTML body or primary indexed specifications inspected; AI-assisted source reading, no independent human review or hardware validation.
Optical vs ARC/eARC, no optical CEC and product-format qualifications.
Read the original sourceSet up your Sonos Beam
Sonos · Live revision unavailable
Beam Gen2 before setup; HDMI-CEC; optical adapter
Inspected 2026-10-23 by public_page. Primary HTML body or primary indexed specifications inspected; AI-assisted source reading, no independent human review or hardware validation.
Exact Beam Gen2 setup, no S1, optical control limitation.
Read the original sourceTelevision Help Guide — Adjusting an audio system
Sony · Live Help Guide identifier iusltn1/v1; revision unavailable
Digital audio out; PCM; eARC passthrough note
Inspected 2026-10-23 by public_page. Primary HTML body or primary indexed specifications inspected; AI-assisted source reading, no independent human review or hardware validation.
Source-scoped Sony TV audio settings; no format conversion promise. Exact US XR-55A80J association verified by live manufacturer listing; see S1262.
Read the original sourceApple TV 4K (3rd generation) - Tech Specs
Apple · 2022 model; page revision not stated
Year introduced; Capacity; Connectivity -> Wi-Fi model; System Requirements; HDMI footnote3
Inspected 2026-10-23 by public_page. Official primary HTML relevant paragraphs inspected with web open; AI-assisted source reading, no independent human review or hardware validation.
Exact 2022 third-generation Wi-Fi/64GB identity, HDMI and built-in power supply; product HDMI footnote bounds its features.
Read the original sourceXR-55A80J Specifications
Sony · 2021 model; live revision unavailable
Connectivity: HDMI ARC/eARC, digital audio output; sound processing
Inspected 2026-10-23 by public_page. Primary HTML body or primary indexed specifications inspected; AI-assisted source reading, no independent human review or hardware validation.
Exact TV has return-channel and digital-audio interfaces; not proof of every app/format.
Read the original sourceTelevision Help Guide — Connecting an audio system
Sony · Live Help Guide identifier iusltn1/v1; revision unavailable
HDMI eARC; ARC; Digital optical
Inspected 2026-10-23 by public_page. Primary HTML body or primary indexed specifications inspected; AI-assisted source reading, no independent human review or hardware validation.
Source-scoped Sony TV procedure; exact region/model menu applicability must be checked against TV Help Guide. Exact US XR-55A80J association verified by live manufacturer listing; see S1262.
Read the original sourceManuals for XR-55A80J — Sony USA
Sony · Help Guide listing released 2025-06-25
Manuals & Warranty → English → Help Guide (Web manual)
Inspected 2026-10-23 by public_page. Live Chrome read-only accessibility tree and exact Help Guide anchor href inspected through CUA; web fetch had timed out; AI-assisted source reading, no independent human review or hardware validation.
Exact US XR-55A80J manual listing links to iusltn1/v1/en-003 Help Guide. Regional applicability binding only, not combined-system test.
Read the original sourceSource-documented education. Hardware behavior and independent human review have not been performed for these examples.