Audio Fix / setup help
Sonos Arc Ultra: use TV Dialog Sync only when television sound arrives early
Configured Arc Ultra room and working TV audio; audio ahead of video, actual TV Dialog Sync available.
Manufacturer-documented Reviewed 2026-11-09 · Revision 1
Follow these checks in Audio Fix →When this guide applies
Configured Arc Ultra room and working TV audio; audio ahead of video, actual TV Dialog Sync available.
Connection scope: HDMI / ARC / eARC audio · Optical digital audio. Symptom: Sound and picture are out of sync.
This is a documented check, not a diagnosis of your equipment. The model name does not confirm the selected input, mode, software or connected partner.
If your exact model or a required setting is unknown, use the “I don’t know” branch below. Do not apply a similarly named model’s instructions.
What owners have reported
These are public, self-reported experiences. They help explain the order of checks and the limits of a guide. They are not controlled tests, proof of a cause, a success rate or a substitute for the manufacturer instructions above.
User-reported Arc Ultra lipsync (with Apple TV)
An owner describes timing difficulty in an Apple TV/Samsung TV/Arc Ultra setup and a later preference for source calibration.
How this informs the checks: Context only: preserve the old delay and distinguish early from late audio. No forum calibration recipe, universal-TV claim or clearing of settings is adopted.
Limits: User-reported public account only. Exact setup, diagnosis and outcome are not independently verified; no prevalence or physical test is claimed.
Read the original public discussion ↗ · Reviewed 2026-11-09
Checks and possible outcomes
Start at step-0. Follow the link that matches what you actually observe. Alternative branches are not a single sequence of actions.
step-0
Does sound arrive before the matching picture movement?
Extra audio delay can worsen sound already late; source/TV processing has a separate path.
Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.
- If Yes, confirmed → Does the current Sonos app control the actual Arc Ultra room normally?
- If No → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Sonos: TV audio and video are out of sync ↗Audio is ahead of the video; current iOS/Android app route — For early audio, Settings > Your System > selected home-theater product > Home Theater > TV Dialog Sync adds delay as the slider moves right. Adding delay is not the prescribed correction for already-late audio.Arc Ultra is an official Sonos home-theater product; actual selected room and visible control required. No S1 route is assumed. · Source checked 2026-11-09
- Manufacturer-documented Arc Ultra official support ↗Product identity and home-theater TV-audio support — The exact Arc Ultra support page identifies its Sonos-app setup and TV-audio troubleshooting as home-theater functions.Exact Arc Ultra, not the older Arc or a portable Sonos speaker. · Source checked 2026-11-09
step-1
Does the current Sonos app control the actual Arc Ultra room normally?
Do not adjust another room or use an S1 menu assumed from an older product.
Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.
- If Yes, confirmed → Is TV Dialog Sync available, with its old value retained for a reversible comparison?
- If No → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Sonos: TV audio and video are out of sync ↗Audio is ahead of the video; current iOS/Android app route — For early audio, Settings > Your System > selected home-theater product > Home Theater > TV Dialog Sync adds delay as the slider moves right. Adding delay is not the prescribed correction for already-late audio.Arc Ultra is an official Sonos home-theater product; actual selected room and visible control required. No S1 route is assumed. · Source checked 2026-11-09
- Manufacturer-documented Arc Ultra official support ↗Product identity and home-theater TV-audio support — The exact Arc Ultra support page identifies its Sonos-app setup and TV-audio troubleshooting as home-theater functions.Exact Arc Ultra, not the older Arc or a portable Sonos speaker. · Source checked 2026-11-09
step-2
Is TV Dialog Sync available, with its old value retained for a reversible comparison?
Unknown control availability stops rather than guesses a firmware fix.
Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.
- If Yes, confirmed → Open Settings > Your System > this Arc Ultra > Home Theater > TV Dialog Sync
- If No → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Sonos: TV audio and video are out of sync ↗Audio is ahead of the video; current iOS/Android app route — For early audio, Settings > Your System > selected home-theater product > Home Theater > TV Dialog Sync adds delay as the slider moves right. Adding delay is not the prescribed correction for already-late audio.Arc Ultra is an official Sonos home-theater product; actual selected room and visible control required. No S1 route is assumed. · Source checked 2026-11-09
- Manufacturer-documented Arc Ultra official support ↗Product identity and home-theater TV-audio support — The exact Arc Ultra support page identifies its Sonos-app setup and TV-audio troubleshooting as home-theater functions.Exact Arc Ultra, not the older Arc or a portable Sonos speaker. · Source checked 2026-11-09
step-3
Open Settings > Your System > this Arc Ultra > Home Theater > TV Dialog Sync
Use the actual corresponding current app setting; leave TV Setup and surround levels unchanged.
Look for: Perform only the stated operation, then confirm it was possible.
- If I completed this → Move the actual delay slider slightly to the right while comparing the same scene
- If I could not do this → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Sonos: TV audio and video are out of sync ↗Audio is ahead of the video; current iOS/Android app route — For early audio, Settings > Your System > selected home-theater product > Home Theater > TV Dialog Sync adds delay as the slider moves right. Adding delay is not the prescribed correction for already-late audio.Arc Ultra is an official Sonos home-theater product; actual selected room and visible control required. No S1 route is assumed. · Source checked 2026-11-09
- Manufacturer-documented Arc Ultra official support ↗Product identity and home-theater TV-audio support — The exact Arc Ultra support page identifies its Sonos-app setup and TV-audio troubleshooting as home-theater functions.Exact Arc Ultra, not the older Arc or a portable Sonos speaker. · Source checked 2026-11-09
step-4
Move the actual delay slider slightly to the right while comparing the same scene
Keep the original value so it can be restored if worse; no numerical delay range is assumed.
Look for: Perform only the stated operation, then confirm it was possible.
- If I completed this → Is that same scene now closer to synchronisation?
- If I could not do this → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Sonos: TV audio and video are out of sync ↗Audio is ahead of the video; current iOS/Android app route — For early audio, Settings > Your System > selected home-theater product > Home Theater > TV Dialog Sync adds delay as the slider moves right. Adding delay is not the prescribed correction for already-late audio.Arc Ultra is an official Sonos home-theater product; actual selected room and visible control required. No S1 route is assumed. · Source checked 2026-11-09
- Manufacturer-documented Arc Ultra official support ↗Product identity and home-theater TV-audio support — The exact Arc Ultra support page identifies its Sonos-app setup and TV-audio troubleshooting as home-theater functions.Exact Arc Ultra, not the older Arc or a portable Sonos speaker. · Source checked 2026-11-09
step-5
Is that same scene now closer to synchronisation?
A changed slider position is not a measured lip-sync result.
Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.
- If Yes, confirmed → Checks completed — report the actual result
- If No → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented Sonos: TV audio and video are out of sync ↗Audio is ahead of the video; current iOS/Android app route — For early audio, Settings > Your System > selected home-theater product > Home Theater > TV Dialog Sync adds delay as the slider moves right. Adding delay is not the prescribed correction for already-late audio.Arc Ultra is an official Sonos home-theater product; actual selected room and visible control required. No S1 route is assumed. · Source checked 2026-11-09
- Manufacturer-documented Arc Ultra official support ↗Product identity and home-theater TV-audio support — The exact Arc Ultra support page identifies its Sonos-app setup and TV-audio troubleshooting as home-theater functions.Exact Arc Ultra, not the older Arc or a portable Sonos speaker. · Source checked 2026-11-09
Possible result
Checks completed — report the actual result
Completion does not automatically mean the problem is solved. Report what actually happened; no physical test or measured repair is claimed.
steps completed
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.
Possible result
Stop at the unconfirmed condition
A required setup or response was not confirmed. Retain the actual observation and consult the exact source/partner manual or official support. Do not escalate to a reset, update installation, internal repair or unsafe wiring change.
next support
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.
Possible result
A required fact is unknown
Confirm the actual model, connection, partner capability and state before continuing. Do not guess a menu, interrupt an installation or modify a live source by trial and error.
insufficient data
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.