Troubleshooting
IPTV No Audio, Audio-Video Drift and Distorted Sound Problems
If there is picture but no sound, or the audio is out of step with the video, the causes are usually an unsupported audio codec (AC3/EAC3/DTS), a wrong audio passthrough setting, the wrong track chosen among several audio tracks or a sync problem in the stream itself.
Quick fix steps
- Check the stream's audio codec with the Stream Codec and Bitrate Info tool.
- Change the audio track (language) in the player.
- Turn off audio passthrough (Dolby/DTS) and try.
- Turn off frame-rate matching.
- Adjust the audio delay by hand in the player; try a different player.
Tools to fix the problem
In-depth explanation
Audio codec compatibility
AAC works everywhere. AC3, EAC3 (Dolby Digital/Plus) and DTS depend on the device hardware or the receiver; a TV's built-in speaker cannot decode some codecs. With passthrough on the device sends the raw sound to the receiver; if the receiver does not support it there is silence. Turning passthrough off makes the player decode the sound to PCM and usually fixes it.
Göktürk IPTV supports hardware passthrough for Dolby Atmos, TrueHD, DTS-HD and EAC3; if the receiver does not support it you can turn passthrough off.
Audio tracks and language
Some streams carry several audio tracks (for example Turkish and the original language). Choose the right track from the player's audio menu. In HLS streams audio tracks are listed under 'Audio and subtitle tracks'; the HLS Stream Tester shows them.
Sync drift
If the drift occurs on only one stream the source stream has the problem. If it happens on all streams, the TV's picture processing (game/movie mode) and receiver delay can matter; turn on game mode on the TV or set an audio delay on the receiver. Frame-rate matching (AFR) can cause a brief drift during a display mode change.
Frequently asked questions
No sound on only one channel?
The source stream may be broken or the audio codec differs on that channel.
Works on the TV but not through the receiver?
Check passthrough and HDMI ARC settings.
Crackling sound?
Network fluctuation or an insufficient buffer; try the Buffering Fix Wizard.
Where is the audio delay setting?
In the player settings as 'audio delay/sync'.