Low audio on all inputs and devices
If audio is low on one device while all others are ok, the device that encounters the issue will require troubleshooting and not the TV.
Some cable or satellite boxes will have their own audio controls for volume.
If you press the Volume +/- button on the TV remote and the audio remains the same while the volume bar rises or falls, the issue is with the cable/satellite box and the volume settings are likely too low.
In this case, raise the volume level of the external device to maximum and use the TV’s volume controller to raise and lower the setting.
Check the audio settings of the TV
Try disabling/enabling “Auto Volume” or “Clear Voice”. Disabling these two features will remove some alteration of the audio by the TV. This will allow you to hear the program according to the broadcaster’s discretion.
You may want to adjust the sound mode based on the type of program you are viewing.
Within the AUDIO menu the TV will give you options for Standard, Music, Cinema, Sports, and Game.
If the audio settings have been adjusted to an unwanted setting you can use the “SOUND RESET” to restore the TV to factory audio settings.
If the sound quality or volume is still not at the level you want, it is recommended to use a separate home theater system or amplifier to cope with different user environments.
In some cases, audio distortion can be the result of reverberation from having the audio too loud, an unsecure device connection to the set, or even interference being bled in from the lines used to connect your cable/satellite box.
Secure the connections
Before any in depth troubleshooting occurs, you first need to inspect your setup and verify that every cable is firmly connected.
Any Device that comes loose/unhooked could be the cause of the issue.
Does this happen on all connected devices or only on one?
If audio distortion is present on all inputs/devices and the connections are connected properly the television may require service.
If the audio distortion is only present on one input, try using a different cable first.
If this only happens on one/several channels, you will need to contact your cable/satellite service provider or the broadcast station itself for further assistance.