Synchronise picture and sound
First establish whether audio is early or late. Use a known recording or sync test with a clear visual/audio event. A problem on one service only may originate in that source.
- Temporarily reduce unnecessary TV picture processing, which can delay video. Keep the TV mode consistent for comparisons.
- Check the route: receiver → AVR and receiver → TV → ARC can have different delays.
- Note existing receiver, player, TV and AVR delays. Adjust one place at a time.
- Change the relevant control in small increments. Positive audio delay makes sound later; it worsens already-late audio. Negative values are not implemented equally by every playback path.
- Recheck PCM, a supported Dolby track and service switching.
Which delay?
Section titled “Which delay?”| Field | Purpose |
|---|---|
| General AC3 delay | Global delay for the corresponding compressed/Dolby path. Source range −1000 to +1000 ms, 5 ms steps. |
| General PCM delay | Global delay for decoded PCM, with the same source range. |
| General BT audio delay | Additional driver-dependent Bluetooth path where available. |
| Service/player-specific delay | Provided by an installed audio-sync extension or player; can combine with global settings. |
| Passthrough handling delay AC3/AC3+ | Stabilisation time during format/service changes on certain platforms. Not a substitute for ongoing lip-sync correction. |
| CEC send/repeat interval | Timing between control messages, unrelated to audio/video synchronisation. |
An optional AudioSync plugin can provide finer global or per-service adjustments. Its menu depends on the installed version; it is not required for the two native general delay controls. Account for saved per-service corrections before changing a global value.
If the offset keeps growing during playback, investigate timestamps, stream, player and buffering. A fixed millisecond correction cannot permanently compensate for continuing drift. Player troubleshooting.