IPTV No Sound UK 2026: Audio Not Working? Full Fix

Why the Picture Works but the Sound Doesn't

Video and audio are decoded on completely separate pipelines inside your streaming device, so it's entirely possible for one to work perfectly while the other fails silently — literally. The most common cause by far is an audio output format your TV or soundbar doesn't support being passed through unconverted, followed by an audio codec (like Dolby AC3 or E-AC3) that your device can decode but your TV's speakers can't render directly.

Audio Output Format: The First Thing to Check

Almost every IPTV app has an audio output setting buried in playback or system settings, usually labelled something like 'Audio passthrough', 'HDMI audio output', or 'Auto/PCM/Bitstream'. If it's set to 'Bitstream' or 'Auto' and your TV doesn't support the format being passed through, you get total silence. Switching this setting to PCM (or 'Stereo' on some apps) forces the device to decode the audio itself and send a universally-compatible signal — this single change fixes the majority of no-sound reports.

Audio Codec Mismatches: AC3, E-AC3 and AAC

Many live TV channels broadcast audio in Dolby Digital (AC3) or Dolby Digital Plus (E-AC3) rather than the simpler AAC most streaming apps default to expecting. If your TV or soundbar's HDMI input doesn't list Dolby Digital as a supported format in its own manual/settings menu, the stream's audio track will silently fail to render even though the video plays perfectly — this is the single most common real cause behind 'no sound on IPTV' complaints.

HDMI-ARC and Soundbar-Specific Issues

If you're running sound through a soundbar or AV receiver via HDMI-ARC/eARC, audio can drop out specifically because the ARC handshake failed while the main video HDMI connection stayed up — these are technically two separate signal paths sharing one cable. Turning the soundbar off and back on (not just muting it) re-triggers the ARC handshake and resolves this in most cases. If your TV has both an ARC and a non-ARC HDMI port, moving the soundbar cable to the dedicated ARC/eARC port (usually labelled) if it isn't already there is worth checking.

Step-by-Step Fix, In Order

Why Some Channels Have Sound and Others Don't

If sound works on some channels but not others on the same app and device, the cause almost always sits with the individual channel's own audio codec, not your setup — different broadcasters encode their feeds differently, and some still use older or less common audio formats. Setting your output to PCM (see above) fixes this for the widest range of channels at once, since it forces consistent decoding rather than relying on your TV correctly handling whatever format each individual channel happens to use.

Smart TV Built-In Apps Specifically

If you're running your IPTV app directly on a Samsung, LG, or other Smart TV operating system rather than through an external streaming box, the audio settings sit in a different place and behave slightly differently to an external device. Samsung Tizen TVs have a separate 'Digital Output Audio Format' setting under Sound → Expert Settings that's independent of any individual app's own audio setting — if this is set to 'Dolby Digital+' or 'Pass-through' while your soundbar or TV speakers don't support that specific format, you get silence regardless of what the IPTV app itself is configured to output. Setting this to 'PCM' at the TV operating-system level, in addition to the app-level PCM setting covered above, resolves cases where the app setting alone doesn't fix it.

LG WebOS TVs have a similar SIMPLINK/ARC audio configuration under Sound settings, and a known quirk where re-pairing a soundbar after a firmware update sometimes resets the audio output format back to a passthrough default even if you'd previously set it to PCM — worth rechecking this setting specifically after any TV or soundbar firmware update, since it's easy to assume a fix has stopped working when actually the setting itself silently reverted.

Rule Out the Simple Stuff Too

Before diving into output formats and codecs, it's worth ruling out the embarrassingly simple causes that genuinely do account for a meaningful share of 'no sound' reports: a TV muted specifically on its own remote (separate from the IPTV app's own volume, which can be turned up while the TV itself is muted), a soundbar's own physical mute button or a secondary remote left in a muted state, and — on devices with more than one audio output option — audio routed to a headphone jack or Bluetooth speaker that isn't currently connected or switched on. A quick check across all three is faster than working through the settings sections above, and costs nothing if it turns out not to be the cause.

Also worth checking: some IPTV apps have their own in-app volume/mute control entirely separate from the device and TV volume, and this can be accidentally muted (often by an accidental remote press) without any obvious visual indicator on some app interfaces. If sound was working an hour ago and nothing about your hardware has changed, this in-app mute is a more likely explanation than any of the deeper codec or output-format issues covered elsewhere in this guide.

Finally, a genuinely underrated check: try a completely different app on the same device (a video app you know works, like YouTube) to confirm the device's audio output path itself is functioning at all before assuming the fault is specific to your IPTV app — this single test cleanly separates a device-wide audio problem from an IPTV-app-specific one, and saves working through the rest of this guide unnecessarily if the real fault is somewhere else entirely.