Applies to: TV with internal speakers and an attached soundbar/home theatre; use the same lawful item and supported output switching.
The useful distinctions
- Sony notes that external audio processing can add delay.
- Sony recommends checking another source when sync differs.
- Some external-route problems leave TV speaker timing unaffected.
Name the audio symptom first
A quiet dialogue line, complete silence and a timing offset are different observations. Choose one to compare and keep the item position fixed. Record the route to the soundbar, including whether the source enters the TV first. The TV-speaker comparison is useful because it removes the external audio segment while preserving the visible picture path.
Keep loudness from misleading the test
A louder destination can seem clearer even when the underlying fault remains. Use a comfortable level and focus on the original symptom. If sync is the complaint, identify whether sound leads or follows the image. If distortion is the complaint, compare the same sound at the same passage rather than unrelated music or menu clicks.
Localise a segment rather than a device
A symptom that appears only externally points toward the soundbar route, including the TV’s external output processing, link and receiver settings. It does not identify a broken speaker. If it remains through TV speakers, preserve that evidence for a source/content or TV-side comparison. The result should include both destinations and actual output formats where the devices expose them.
A focused way to proceed
- Record the exact symptom on the current soundbar route.
- Select the TV speakers using the exact model’s supported method.
- Replay the same passage at a comfortable comparable loudness.
- Restore external audio and repeat.
- Record whether silence, distortion or sync follows the destination.
Worked example · synthetic
Hypothetical example: a visible clap and its sound align through TV speakers, while the same passage’s sound arrives late through the soundbar. The next investigation targets the external audio route and processing, without assuming the soundbar hardware is defective.
When to stop or ask for help
Different destinations may use different processing or formats. Treat this as route isolation and use model-specific guidance for any correction.