Short answer: if the delay is the same on every channel and every app, the cause is in your living room, not the stream: usually a soundbar or receiver decoding surround sound, or the television's picture processing running slower than the audio. Switching audio output to PCM, using the TV's game or low-latency mode and adjusting the lip-sync setting fixes most cases. If only one channel or one app drifts, the problem is that stream or that app, and no TV setting will fix it properly.
At a glance
Audio out of sync on IPTV
| First test | One channel, or everything? |
| Most common cause | Soundbar or receiver over HDMI ARC |
| Quickest fix | Set audio output to PCM |
| Fine-tune | TV or app lip-sync / AV sync setting |
| Drift that grows | Usually the app or stream, not the TV |
| Last resort | Restart the box and the app |
Start with one test: is it everywhere?
Before touching any settings, play three things: a different channel in your IPTV app, a video in a mainstream app such as YouTube on the same device, and a programme from the TV's own tuner or built-in apps.
| What you see | Likely cause | Where to fix it |
|---|---|---|
| Every source is out of sync | Soundbar, receiver or TV processing | TV and audio settings |
| Only the streaming box is out | Box's audio output format | Box settings |
| Only the IPTV app is out | App's player or decoder | App settings |
| Only one channel is out | That channel's stream | Report to your provider |
| Starts fine, drifts over time | App buffer or stream timing | Restart app; change player |
This single test saves most of the guesswork. Everything below is sorted by which answer you got.
Soundbars and receivers: the usual suspect
Sound travelling from the TV to a soundbar over HDMI ARC or eARC is the most common source of lip-sync problems.
Why it happens. When the TV passes surround formats such as Dolby Digital straight through, the soundbar has to decode them. That takes time, and on inexpensive bars the delay can be long enough to see. Surround processing, dialogue enhancement and virtual surround modes add more.
Try PCM first. In the TV's sound settings, change digital audio output from Auto, Bitstream or Passthrough to PCM. The TV then decodes the audio itself and sends plain stereo or multichannel sound the soundbar can play immediately. The trade-off is that formats like Dolby Atmos and DTS may not reach the soundbar, which matters for films far more than for live TV.
Switch off the extras. Night mode, volume levelling, equalisers and "movie" or "sport" sound modes all need processing time on the bar.
Connect the box to the soundbar if it has an HDMI input. The streaming box then feeds the bar directly and the picture passes through to the TV, so sound and picture are handled together.
TV picture processing
If the TV's own speakers are out of sync too, the picture may be arriving late rather than the sound arriving early.
Motion smoothing and noise reduction hold back several frames to process them. Sound doesn't wait for them. Switching these off, or choosing a Game or low-latency picture mode for the IPTV input, often closes the gap.
Use the lip-sync setting. Most TVs have one, under names like AV Sync, Audio Delay, Digital Output Audio Delay or Lip Sync. On many models it can only delay the sound, which fixes sound that's early but not sound that's late. That's why processing settings come first.
Streaming box and stick settings
The box between the stream and the TV has its own audio options, and mismatches between box, TV and soundbar are common.
Android TV and Google TV: look under Settings, then Display & Sound or Audio, for a surround sound option. Setting it to Automatic or Never (stereo PCM) is a reliable baseline; forcing formats the soundbar can't handle often causes delay or silence.
Fire TV (Fire OS): Settings, Display & Sounds, Audio has Surround Sound and Dolby Digital Output options, plus an AV Sync Tuning tool on many models that plays a test pattern so you can line things up by eye.
Apple TV: Settings, Video and Audio has Wireless Audio Sync, which uses an iPhone's microphone to measure and correct the delay. It's intended for AirPlay speakers but helps with some soundbars too.
Roku: audio settings include Audio mode (set to Stereo to test) and, on some models, an audio-delay adjustment for connected speakers.
For device-specific setup, our guides to IPTV on Android TV and IPTV on Firestick cover the rest of the menus.
Player app settings
If only your IPTV player is out of sync, look inside the app.
Audio delay or offset. Most player apps have a per-app or per-stream audio delay control, often in the playback menu while a channel is playing. Adjust in small steps, around 50-100 ms, until mouths match.
Change the decoder. Many players let you pick between a hardware decoder, a software decoder and different playback engines. Hardware decoding is faster but occasionally mishandles a stream's timing; switching engine is a quick test.
Audio passthrough inside the app. Some players have their own passthrough setting that overrides the box. If it's on and your soundbar struggles, turn it off.
Update the app. Timing bugs are fixed in updates more often than you'd expect, especially after a box's system update.
When the stream itself is the problem
One channel out, the rest fine. The broadcast source for that channel is misaligned. A licensed provider can fix this at their end; report the channel and the time. An app delay setting can mask it, but you'll have to undo it for every other channel.
Sync that drifts during a programme. If it starts fine and gets worse over an hour, the player is struggling with the stream's timing, often because of buffering. Restarting the channel resets it. Frequent drift points to network problems; a wired connection helps.
Bluetooth headphones add a large, fixed delay of their own. Low-latency codecs reduce it; otherwise use the app's audio delay setting.
A fix order that works
If you want a sequence to follow rather than a list to read:
1. Restart the streaming box and the app.
2. Test other channels and apps to see where the delay lives.
3. Set the TV's digital audio output to PCM.
4. Turn off motion smoothing and use Game mode on that input.
5. Turn off the soundbar's surround and dialogue processing.
6. Fine-tune with the TV's or box's lip-sync setting.
7. Only then use the app's audio delay, and only for problems confined to the app.
Change one thing at a time, and note what you changed. It's easy to fix the problem with one setting and reintroduce it with another.
Quick answers
Why is my IPTV audio out of sync? Most often because a soundbar or receiver is decoding surround sound, or the TV's picture processing is delaying the image. If only one channel is affected, that channel's stream is the cause.
How do I fix audio delay on a soundbar? Set the TV's digital audio output to PCM, turn off surround and dialogue modes on the bar, and use the TV's lip-sync setting. Connecting the streaming box to the soundbar's HDMI input, if it has one, also helps.
Why can't the lip-sync setting fix it? Many TVs and soundbars can only delay the audio. If the sound is already late, delaying it further makes it worse; cut audio processing instead, by switching to PCM and turning off soundbar sound modes.
Does PCM reduce sound quality? For live TV, rarely noticeably. You may lose passthrough of formats like Dolby Atmos or DTS to the soundbar, which matters more for films.
Why does the sync get worse the longer I watch? That usually points to the player app or network buffering rather than the TV. Restart the channel, update the app, try a different decoder, and consider a wired connection.
Is audio out of sync a sign of a bad IPTV service? Not necessarily. If every source is affected, the cause is your equipment. If only certain channels drift, report them to your provider.
Menu names vary between TV brands, streaming devices and software versions, and player apps change their settings layouts in updates. Checked September 2026.