When picture and sound drift on the Smart Ultra Soundbar, adjust Audio Delay in the Bose app: tap Audio, scroll to Sync and Delay, choose Audio Delay and try values from 0 (no delay) to 200 (maximum). Bose also says pausing and resuming audio can worsen the sync until you turn the soundbar off and on, that TVs and streaming boxes may have their own delay setting, and that an extender can make grouped speakers play out of step.
Differential
Likely causes of “Bose Smart Ultra Soundbar audio is delayed or out of sync”, and how to tell them apart
- 1
A Bluetooth source with built-in delay
What separates it Sync is only off for video sent over Bluetooth
How to confirm Switch the source to HDMI eARC or optical
- 2
The delay setting is wrong
What separates it Speech leads or trails the lips constantly on every program, not just one show
How to confirm Step Audio Delay in small increments while watching one clip
- 3
Pause and resume drift
What separates it The offset gets a little worse each time playback is paused and resumed
How to confirm Turn the soundbar off and on to reset the link
- 4
A grouped speaker on an extender
What separates it Grouped speakers echo because they play the same audio at different moments
How to confirm Connect all speakers to the same router or extender
Before you touch a setting
Record this first — changing settings destroys the evidence
- Which source shows the delay and which stays in sync
- The current Audio Delay number in the Bose app
- Whether the TV or box has its own delay control
Try in this order
0 of 5 completedIdentify the source
ReversibleCheck which input the soundbar is using. Wired HDMI eARC and optical usually stay in sync while Bluetooth adds delay.
Adjust Audio Delay
ReversibleIn the Bose app tap Audio, scroll to Sync and Delay, and pick Audio Delay. Move between 0 and 200 while watching speech.
Check TV settings
ReversibleLook for audio delay or lip-sync options in the TV or streaming box menus and adjust only one place at a time.
Restart Bluetooth
ReversibleIf sync worsens after pausing, turn the soundbar off and back on to restart the connection.
Group check
ReversibleIf the soundbar is grouped, connect every speaker directly to the router instead of an extender so they receive audio together.
Model-specific
What is true of this model and not of its siblings
- Sync
- Audio Delay runs from 0 to 200 in the Bose app. Pausing can push some sources out of sync, and a slight Bluetooth delay is normal.
- Bluetooth
- Bluetooth with A2DP, AVRCP and BLE profiles and about 30 feet of range. Bose says it used proven earlier Bluetooth hardware, because the newer 5.1 version made no difference to A2DP stereo audio.
- Network information
- The Bose app's Technical Info screen shows the IP address, MAC address and Wi-Fi Strength, and Bose lists determining the default gateway as a separate procedure. Recommended router settings include UPnP, multicast and IGMP on and a fixed channel, with WPA-2 AES security and wireless isolation off.
- Grouping
- In the Bose app tap Group, then + Add All or pick individual speakers; only one Bluetooth product can join through SimpleSync. Volume can be set for the group or per speaker, Bluetooth headphone volume must be set on the headphones, and Saved Groups from 9 April 2025 keep favorite combinations.
- Firmware theme
- The 600's 7.0.10 release notes say both the Smart Soundbar 600 and the Smart Ultra Soundbar default to the TV source whenever the TV powers on. Later firmware notes describe features such as Saved Groups and Atmos streaming through Amazon Music and Chromecast. Keep the app current so updates are offered.
- Recovery steps
- If the soundbar misbehaves, work in order: power reset with the accessories unplugged for 30 seconds, then setup mode with Mute and Bose Music, then remove it from your Bose account and use the Play/Pause and Volume - factory restore. Each step erases more, so stop when the fault clears.
Stop boundary
When this stops being a self-service repair
- !If the delay persists on wired HDMI at every delay value, request service
- !If only one app is delayed, report it to the app's developer
Evidence ledger
Sources behind this answer
The 30-second power reset, the Play/Pause and Volume - factory restore.
Mute and Bose Music held five seconds until the light bar glows amber.
App setup and the ADAPTiQ headset step.
Light bar colors, microphone LED and bass module LED.
PCM output, HDMI CEC options, source selection and reboot steps.
Options 2 to 7 explained.
The 0 to 200 audio delay under Sync and Delay.
Delay, extender and input checks.
Group, Saved Groups, SimpleSync and Spotify.
Wi-Fi and grouped speaker checks.
Source, Bluetooth and memory order.
Why the soundbar uses proven Bluetooth hardware.
Front sensor, batteries, 20-foot range.
Microphone button, account link and reset steps.
Nine speakers, Atmos formats, eARC, dimensions and box contents.
Exact questions
Common questions
What is the Audio Delay range?+
0 for no delay up to 200.
Does Bluetooth add delay?+
Yes, a slight delay is normal.
Can pausing cause drift?+
Yes, on some devices each pause and resume leaves the sound slightly more out of sync.
Where is Sync and Delay?+
In the Bose app under Audio.
Can an extender cause echo?+
Yes, speakers connected through an extender can receive the stream later than others.
Do I need both TV and soundbar delay?+
Usually one is enough; changing both at once makes the result hard to judge.
Is HDMI faster than Bluetooth?+
Yes, wired HDMI eARC normally stays in sync while Bluetooth adds some delay.
Does a reset clear the delay setting?+
No, the power reset keeps settings.